128956454 has 16 divisors (see below), whose sum is σ = 211230720. Its totient is φ = 58557960.

The previous prime is 128956427. The next prime is 128956489. The reversal of 128956454 is 454659821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25847 + ... + 30429.

It is an arithmetic number, because the mean of its divisors is an integer number (13201920).

Almost surely, 2^128956454 is an apocalyptic number.

128956454 is a deficient number, since it is larger than the sum of its proper divisors (82274266).

128956454 is a wasteful number, since it uses less digits than its factorization.

128956454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5875.

The product of its digits is 345600, while the sum is 44.

The square root of 128956454 is about 11355.8995240360. The cubic root of 128956454 is about 505.2205735130.

The spelling of 128956454 in words is "one hundred twenty-eight million, nine hundred fifty-six thousand, four hundred fifty-four".