40024020 has 48 divisors (see below), whose sum is σ = 112387968. Its totient is φ = 10642560.

The previous prime is 40024009. The next prime is 40024057. The reversal of 40024020 is 2042004.

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 = 40023987 and 40024005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26937 + ... + 28383.

It is an arithmetic number, because the mean of its divisors is an integer number (2341416).

Almost surely, 2^40024020 is an apocalyptic number.

It is an amenable number.

40024020 is an abundant number, since it is smaller than the sum of its proper divisors (72363948).

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

40024020 is a wasteful number, since it uses less digits than its factorization.

40024020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 40024020 is about 6326.4539830777. The cubic root of 40024020 is about 342.0636316744.

Adding to 40024020 its reverse (2042004), we get a palindrome (42066024).

The spelling of 40024020 in words is "forty million, twenty-four thousand, twenty".