70405904 has 10 divisors (see below), whose sum is σ = 136411470. Its totient is φ = 35202944.

The previous prime is 70405903. The next prime is 70405913. The reversal of 70405904 is 40950407.

It can be written as a sum of positive squares in only one way, i.e., 68095504 + 2310400 = 8252^2 + 1520^2 .

70405904 is a modest number, since divided by 5904 gives 704 as remainder.

It is not an unprimeable number, because it can be changed into a prime (70405901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2200169 + ... + 2200200.

It is an arithmetic number, because the mean of its divisors is an integer number (13641147).

Almost surely, 2^70405904 is an apocalyptic number.

It is an amenable number.

70405904 is a deficient number, since it is larger than the sum of its proper divisors (66005566).

70405904 is a wasteful number, since it uses less digits than its factorization.

70405904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400377 (or 4400371 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 70405904 is about 8390.8226056806. The cubic root of 70405904 is about 412.9235886285.

The spelling of 70405904 in words is "seventy million, four hundred five thousand, nine hundred four".