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40372880 = 245504661
BaseRepresentation
bin1001101000000…
…0101010010000
32210222011011212
42122000222100
540313413010
64001155252
71000110122
oct232005220
983864155
1040372880
1120875819
121162bb28
1384974a2
14550d212
153827505
hex2680a90

40372880 has 20 divisors (see below), whose sum is σ = 93867132. Its totient is φ = 16149120.

The previous prime is 40372879. The next prime is 40372897. The reversal of 40372880 is 8827304.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 16908544 = 4844^2 + 4112^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252251 + ... + 252410.

Almost surely, 240372880 is an apocalyptic number.

40372880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40372880 is an abundant number, since it is smaller than the sum of its proper divisors (53494252).

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

40372880 is a wasteful number, since it uses less digits than its factorization.

40372880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504674 (or 504668 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 40372880 is about 6353.9656908107. The cubic root of 40372880 is about 343.0545972413.

The spelling of 40372880 in words is "forty million, three hundred seventy-two thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 504661 1009322 2018644 2523305 4037288 5046610 8074576 10093220 20186440 40372880