74402690 has 16 divisors (see below), whose sum is σ = 138543480. Its totient is φ = 28734720.

The previous prime is 74402687. The next prime is 74402747. The reversal of 74402690 is 9620447.

It can be written as a sum of positive squares in 4 ways, for example, as 70879561 + 3523129 = 8419^2 + 1877^2 .

It is a super-2 number, since 2×74402690² = 11071520558472200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127991 + ... + 128570.

Almost surely, 2^74402690 is an apocalyptic number.

74402690 is a deficient number, since it is larger than the sum of its proper divisors (64140790).

74402690 is a wasteful number, since it uses less digits than its factorization.

74402690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256597.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 74402690 is about 8625.6993919334. The cubic root of 74402690 is about 420.5938123547.

The spelling of 74402690 in words is "seventy-four million, four hundred two thousand, six hundred ninety".