128402884 has 12 divisors (see below), whose sum is σ = 225072400. Its totient is φ = 64096488.

The previous prime is 128402873. The next prime is 128402903. The reversal of 128402884 is 488204821.

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, 23454 + ... + 28405.

Almost surely, 2^128402884 is an apocalyptic number.

It is an amenable number.

128402884 is a deficient number, since it is larger than the sum of its proper divisors (96669516).

128402884 is a wasteful number, since it uses less digits than its factorization.

128402884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52482 (or 52480 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 37.

The square root of 128402884 is about 11331.4996359705. The cubic root of 128402884 is about 504.4966182883.

It can be divided in two parts, 128402 and 884, that added together give a triangular number (129286 = T₅₀₈).

The spelling of 128402884 in words is "one hundred twenty-eight million, four hundred two thousand, eight hundred eighty-four".