128315672 has 16 divisors (see below), whose sum is σ = 242800800. Its totient is φ = 63568800.

The previous prime is 128315651. The next prime is 128315717. The reversal of 128315672 is 276513821.

It is a happy number.

It is a super-3 number, since 3×128315672³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 72704 + ... + 74447.

It is an arithmetic number, because the mean of its divisors is an integer number (15175050).

Almost surely, 2^128315672 is an apocalyptic number.

It is an amenable number.

128315672 is a deficient number, since it is larger than the sum of its proper divisors (114485128).

128315672 is a wasteful number, since it uses less digits than its factorization.

128315672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147266 (or 147262 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 128315672 is about 11327.6507714530. The cubic root of 128315672 is about 504.3823733879.

The spelling of 128315672 in words is "one hundred twenty-eight million, three hundred fifteen thousand, six hundred seventy-two".