128740944 has 20 divisors (see below), whose sum is σ = 332580896. Its totient is φ = 42913632.

The previous prime is 128740921. The next prime is 128740951. The reversal of 128740944 is 449047821.

It is a super-2 number, since 2×128740944² = 33148461324022272, which contains 22 as substring.

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, 1341004 + ... + 1341099.

Almost surely, 2^128740944 is an apocalyptic number.

It is an amenable number.

128740944 is an abundant number, since it is smaller than the sum of its proper divisors (203839952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128740944 is a wasteful number, since it uses less digits than its factorization.

128740944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682114 (or 2682108 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128740944 is about 11346.4066558536. The cubic root of 128740944 is about 504.9389776934.

The spelling of 128740944 in words is "one hundred twenty-eight million, seven hundred forty thousand, nine hundred forty-four".