128506072 has 8 divisors (see below), whose sum is σ = 240948900. Its totient is φ = 64253032.

The previous prime is 128506057. The next prime is 128506087. The reversal of 128506072 is 270605821.

It is an interprime number because it is at equal distance from previous prime (128506057) and next prime (128506087).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8031622 + ... + 8031637.

Almost surely, 2^128506072 is an apocalyptic number.

It is an amenable number.

128506072 is a deficient number, since it is larger than the sum of its proper divisors (112442828).

128506072 is a wasteful number, since it uses less digits than its factorization.

128506072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16063265 (or 16063261 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 128506072 is about 11336.0518700295. The cubic root of 128506072 is about 504.6317244391.

The spelling of 128506072 in words is "one hundred twenty-eight million, five hundred six thousand, seventy-two".