40231956 has 24 divisors (see below), whose sum is σ = 94398304. Its totient is φ = 13335840.

The previous prime is 40231951. The next prime is 40231963. The reversal of 40231956 is 65913204.

It is a super-2 number, since 2×40231956² = 3237220567171872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231951) 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 7 ways as a sum of consecutive naturals, for example, 7090 + ... + 11433.

Almost surely, 2^40231956 is an apocalyptic number.

It is an amenable number.

40231956 is an abundant number, since it is smaller than the sum of its proper divisors (54166348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40231956 is a wasteful number, since it uses less digits than its factorization.

40231956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18711 (or 18709 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 40231956 is about 6342.8665443946. The cubic root of 40231956 is about 342.6549809201.

The spelling of 40231956 in words is "forty million, two hundred thirty-one thousand, nine hundred fifty-six".