128133724 has 6 divisors (see below), whose sum is σ = 224234024. Its totient is φ = 64066860.

The previous prime is 128133671. The next prime is 128133727. The reversal of 128133724 is 427331821.

It is a super-2 number, since 2×128133724² = 32836502452216352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128133727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16016712 + ... + 16016719.

Almost surely, 2^128133724 is an apocalyptic number.

It is an amenable number.

128133724 is a deficient number, since it is larger than the sum of its proper divisors (96100300).

128133724 is a wasteful number, since it uses less digits than its factorization.

128133724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32033435 (or 32033433 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 128133724 is about 11319.6167779656. The cubic root of 128133724 is about 504.1438606293.

The spelling of 128133724 in words is "one hundred twenty-eight million, one hundred thirty-three thousand, seven hundred twenty-four".