28960638 has 32 divisors (see below), whose sum is σ = 66437376. Its totient is φ = 8244288.

The previous prime is 28960619. The next prime is 28960643. The reversal of 28960638 is 83606982.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28960638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12045 + ... + 14247.

It is an arithmetic number, because the mean of its divisors is an integer number (2076168).

Almost surely, 2^28960638 is an apocalyptic number.

28960638 is an abundant number, since it is smaller than the sum of its proper divisors (37476738).

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

28960638 is a wasteful number, since it uses less digits than its factorization.

28960638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 28960638 is about 5381.5088962112. The cubic root of 28960638 is about 307.0926167174.

The spelling of 28960638 in words is "twenty-eight million, nine hundred sixty thousand, six hundred thirty-eight".