31040004 has 12 divisors (see below), whose sum is σ = 72426704. Its totient is φ = 10346664.

The previous prime is 31039991. The next prime is 31040017. The reversal of 31040004 is 40004013.

It is an interprime number because it is at equal distance from previous prime (31039991) and next prime (31040017).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 2586667 = 31040004 / (3 + 1 + 0 + 4 + 0 + 0 + 0 + 4).

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, 1293322 + ... + 1293345.

Almost surely, 2^31040004 is an apocalyptic number.

It is an amenable number.

31040004 is an abundant number, since it is smaller than the sum of its proper divisors (41386700).

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

31040004 is a wasteful number, since it uses less digits than its factorization.

31040004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586674 (or 2586672 counting only the distinct ones).

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

The square root of 31040004 is about 5571.3556698527. The cubic root of 31040004 is about 314.2731338136.

Adding to 31040004 its reverse (40004013), we get a palindrome (71044017).

The spelling of 31040004 in words is "thirty-one million, forty thousand, four".