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40499840 = 27563281
BaseRepresentation
bin1001101001111…
…1101010000000
32211012121100002
42122133222000
540331443330
64004015132
71001146223
oct232375200
984177302
1040499840
1120952147
12116914a8
138510204
1455435ba
15384ee45
hex269fa80

40499840 has 32 divisors (see below), whose sum is σ = 96821460. Its totient is φ = 16199680.

The previous prime is 40499813. The next prime is 40499843. The reversal of 40499840 is 4899404.

It can be written as a sum of positive squares in 2 ways, for example, as 37650496 + 2849344 = 6136^2 + 1688^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 40499794 and 40499803.

It is not an unprimeable number, because it can be changed into a prime (40499843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31001 + ... + 32280.

Almost surely, 240499840 is an apocalyptic number.

40499840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40499840 is an abundant number, since it is smaller than the sum of its proper divisors (56321620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40499840 is an equidigital number, since it uses as much as digits as its factorization.

40499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63300 (or 63288 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40499840 is about 6363.9484598793. The cubic root of 40499840 is about 343.4138205326.

The spelling of 40499840 in words is "forty million, four hundred ninety-nine thousand, eight hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 128 160 320 640 63281 126562 253124 316405 506248 632810 1012496 1265620 2024992 2531240 4049984 5062480 8099968 10124960 20249920 40499840