40040004 has 24 divisors (see below), whose sum is σ = 94823008. Its totient is φ = 13147200.

The previous prime is 40039999. The next prime is 40040017. The reversal of 40040004 is 40004004.

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

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, 24097 + ... + 25704.

Almost surely, 2^40040004 is an apocalyptic number.

It is an amenable number.

40040004 is an abundant number, since it is smaller than the sum of its proper divisors (54783004).

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

40040004 is a wasteful number, since it uses less digits than its factorization.

40040004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49875 (or 49873 counting only the distinct ones).

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

The square root of 40040004 is about 6327.7171238923. The cubic root of 40040004 is about 342.1091611457.

Adding to 40040004 its reverse (40004004), we get a palindrome (80044008).

It can be divided in two parts, 4004000 and 4, that added together give a palindrome (4004004).

The spelling of 40040004 in words is "forty million, forty thousand, four", and thus it is an eban number.