31240004 has 6 divisors (see below), whose sum is σ = 54670014. Its totient is φ = 15620000.

The previous prime is 31239977. The next prime is 31240019. The reversal of 31240004 is 40004213.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 6240004 = 5000^2 + 2498^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3904997 + ... + 3905004.

It is an arithmetic number, because the mean of its divisors is an integer number (9111669).

Almost surely, 2^31240004 is an apocalyptic number.

It is an amenable number.

31240004 is a deficient number, since it is larger than the sum of its proper divisors (23430010).

31240004 is a wasteful number, since it uses less digits than its factorization.

31240004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810005 (or 7810003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31240004 is about 5589.2758028210. The cubic root of 31240004 is about 314.9466744367.

Adding to 31240004 its reverse (40004213), we get a palindrome (71244217).

The spelling of 31240004 in words is "thirty-one million, two hundred forty thousand, four".