40878004 has 12 divisors (see below), whose sum is σ = 71589924. Its totient is φ = 20423744.

The previous prime is 40877957. The next prime is 40878017. The reversal of 40878004 is 40087804.

It can be written as a sum of positive squares in 2 ways, for example, as 29181604 + 11696400 = 5402^2 + 3420^2 .

It is a super-2 number, since 2×40878004² = 3342022422048032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984 + ... + 9880.

It is an arithmetic number, because the mean of its divisors is an integer number (5965827).

Almost surely, 2^40878004 is an apocalyptic number.

It is an amenable number.

40878004 is a deficient number, since it is larger than the sum of its proper divisors (30711920).

40878004 is a wasteful number, since it uses less digits than its factorization.

40878004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634 (or 7632 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 40878004 is about 6393.5908533468. The cubic root of 40878004 is about 344.4793771793.

It can be divided in two parts, 4087800 and 4, that added together give a palindrome (4087804).

The spelling of 40878004 in words is "forty million, eight hundred seventy-eight thousand, four".