40231020 has 24 divisors (see below), whose sum is σ = 112647024. Its totient is φ = 10728256.

The previous prime is 40231007. The next prime is 40231039. The reversal of 40231020 is 2013204.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40230987 and 40231005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335199 + ... + 335318.

It is an arithmetic number, because the mean of its divisors is an integer number (4693626).

Almost surely, 2^40231020 is an apocalyptic number.

It is an amenable number.

40231020 is an abundant number, since it is smaller than the sum of its proper divisors (72416004).

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

40231020 is a wasteful number, since it uses less digits than its factorization.

40231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670529 (or 670527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40231020 is about 6342.7927602910. The cubic root of 40231020 is about 342.6523236000.

Adding to 40231020 its reverse (2013204), we get a palindrome (42244224).

The spelling of 40231020 in words is "forty million, two hundred thirty-one thousand, twenty".