40431888 has 60 divisors (see below), whose sum is σ = 129321088. Its totient is φ = 11551680.

The previous prime is 40431877. The next prime is 40431889. The reversal of 40431888 is 88813404.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40431889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19048 + ... + 21063.

Almost surely, 2^40431888 is an apocalyptic number.

40431888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40431888 is an abundant number, since it is smaller than the sum of its proper divisors (88889200).

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

40431888 is a wasteful number, since it uses less digits than its factorization.

40431888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40132 (or 40123 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 40431888 is about 6358.6073947052. The cubic root of 40431888 is about 343.2216492448.

The spelling of 40431888 in words is "forty million, four hundred thirty-one thousand, eight hundred eighty-eight".