128402913 has 8 divisors (see below), whose sum is σ = 175831168. Its totient is φ = 83288304.

The previous prime is 128402903. The next prime is 128402927. The reversal of 128402913 is 319204821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128402913 - 2²¹ = 126305761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128402903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578281 + ... + 578502.

It is an arithmetic number, because the mean of its divisors is an integer number (21978896).

Almost surely, 2^128402913 is an apocalyptic number.

It is an amenable number.

128402913 is a deficient number, since it is larger than the sum of its proper divisors (47428255).

128402913 is a wasteful number, since it uses less digits than its factorization.

128402913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156823.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 128402913 is about 11331.5009155892. The cubic root of 128402913 is about 504.4966562688.

It can be divided in two parts, 12840 and 2913, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 128402913 in words is "one hundred twenty-eight million, four hundred two thousand, nine hundred thirteen".