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40407057 = 3243263397
BaseRepresentation
bin1001101000100…
…1000000010001
32211000220001200
42122021000101
540321011212
64002021413
71000311555
oct232110021
984026050
1040407057
1120899469
1211647869
1384a9c02
14551b865
1538326dc
hex2689011

40407057 has 24 divisors (see below), whose sum is σ = 60101184. Its totient is φ = 26145504.

The previous prime is 40407049. The next prime is 40407061. The reversal of 40407057 is 75070404.

It is not a de Polignac number, because 40407057 - 23 = 40407049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40407057.

It is not an unprimeable number, because it can be changed into a prime (40407007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101583 + ... + 101979.

It is an arithmetic number, because the mean of its divisors is an integer number (2504216).

Almost surely, 240407057 is an apocalyptic number.

It is an amenable number.

40407057 is a deficient number, since it is larger than the sum of its proper divisors (19694127).

40407057 is a wasteful number, since it uses less digits than its factorization.

40407057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 40407057 is about 6356.6545446485. The cubic root of 40407057 is about 343.1513723546.

The spelling of 40407057 in words is "forty million, four hundred seven thousand, fifty-seven".

Divisors: 1 3 9 43 129 263 387 397 789 1191 2367 3573 11309 17071 33927 51213 101781 104411 153639 313233 939699 4489673 13469019 40407057