40045756 has 12 divisors (see below), whose sum is σ = 71040592. Its totient is φ = 19748448.

The previous prime is 40045741. The next prime is 40045777. The reversal of 40045756 is 65754004.

It is a happy number.

It is a super-2 number, since 2×40045756² = 3207325147223072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 68280 + ... + 68863.

Almost surely, 2^40045756 is an apocalyptic number.

It is an amenable number.

40045756 is a deficient number, since it is larger than the sum of its proper divisors (30994836).

40045756 is a wasteful number, since it uses less digits than its factorization.

40045756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137220 (or 137218 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 40045756 is about 6328.1716158777. The cubic root of 40045756 is about 342.1255424100.

The spelling of 40045756 in words is "forty million, forty-five thousand, seven hundred fifty-six".