128297424 has 40 divisors (see below), whose sum is σ = 348881440. Its totient is φ = 40514688.

The previous prime is 128297413. The next prime is 128297459. The reversal of 128297424 is 424792821.

It is a happy number.

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, 69427 + ... + 71250.

It is an arithmetic number, because the mean of its divisors is an integer number (8722036).

Almost surely, 2^128297424 is an apocalyptic number.

It is an amenable number.

128297424 is an abundant number, since it is smaller than the sum of its proper divisors (220584016).

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

128297424 is a wasteful number, since it uses less digits than its factorization.

128297424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140707 (or 140701 counting only the distinct ones).

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

The square root of 128297424 is about 11326.8452801299. The cubic root of 128297424 is about 504.3584625495.

The spelling of 128297424 in words is "one hundred twenty-eight million, two hundred ninety-seven thousand, four hundred twenty-four".