128402404 has 12 divisors (see below), whose sum is σ = 241989244. Its totient is φ = 59262624.

The previous prime is 128402387. The next prime is 128402419. The reversal of 128402404 is 404204821.

It can be written as a sum of positive squares in 2 ways, for example, as 60372900 + 68029504 = 7770^2 + 8248^2 .

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, 1234587 + ... + 1234690.

Almost surely, 2^128402404 is an apocalyptic number.

It is an amenable number.

128402404 is a deficient number, since it is larger than the sum of its proper divisors (113586840).

128402404 is a wasteful number, since it uses less digits than its factorization.

128402404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469294 (or 2469292 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 128402404 is about 11331.4784560533. The cubic root of 128402404 is about 504.4959896454.

The spelling of 128402404 in words is "one hundred twenty-eight million, four hundred two thousand, four hundred four".