40265731 has 32 divisors (see below), whose sum is σ = 49029120. Its totient is φ = 32659200.

The previous prime is 40265713. The next prime is 40265773. The reversal of 40265731 is 13756204.

It is a cyclic number.

It is not a de Polignac number, because 40265731 - 2¹¹ = 40263683 is a prime.

It is a super-2 number, since 2×40265731² = 3242658185928722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40265731.

It is not an unprimeable number, because it can be changed into a prime (40265131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316990 + ... + 317116.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^40265731 is an apocalyptic number.

40265731 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40265731 is a deficient number, since it is larger than the sum of its proper divisors (8763389).

40265731 is a wasteful number, since it uses less digits than its factorization.

40265731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40265731 is about 6345.5284255923. The cubic root of 40265731 is about 342.7508411603.

The spelling of 40265731 in words is "forty million, two hundred sixty-five thousand, seven hundred thirty-one".