40072757 has 8 divisors (see below), whose sum is σ = 42610392. Its totient is φ = 37555200.

The previous prime is 40072699. The next prime is 40072763. The reversal of 40072757 is 75727004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14205361 + 25867396 = 3769^2 + 5086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40072757 - 2¹⁶ = 40007221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794 + ... + 8987.

It is an arithmetic number, because the mean of its divisors is an integer number (5326299).

Almost surely, 2^40072757 is an apocalyptic number.

It is an amenable number.

40072757 is a deficient number, since it is larger than the sum of its proper divisors (2537635).

40072757 is a wasteful number, since it uses less digits than its factorization.

40072757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 40072757 is about 6330.3046530163. The cubic root of 40072757 is about 342.2024182747.

The spelling of 40072757 in words is "forty million, seventy-two thousand, seven hundred fifty-seven".