40038531 has 16 divisors (see below), whose sum is σ = 59475360. Its totient is φ = 23788800.

The previous prime is 40038527. The next prime is 40038539. The reversal of 40038531 is 13583004.

It is not a de Polignac number, because 40038531 - 2² = 40038527 is a prime.

It is a super-2 number, since 2×40038531² = 3206167929275922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40038539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16570 + ... + 18831.

It is an arithmetic number, because the mean of its divisors is an integer number (3717210).

Almost surely, 2^40038531 is an apocalyptic number.

40038531 is a deficient number, since it is larger than the sum of its proper divisors (19436829).

40038531 is a wasteful number, since it uses less digits than its factorization.

40038531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35446.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40038531 is about 6327.6007301346. The cubic root of 40038531 is about 342.1049658999.

The spelling of 40038531 in words is "forty million, thirty-eight thousand, five hundred thirty-one".