28862388 has 18 divisors (see below), whose sum is σ = 72957794. Its totient is φ = 9620784.

The previous prime is 28862359. The next prime is 28862389. The reversal of 28862388 is 88326882.

It can be written as a sum of positive squares in only one way, i.e., 21178404 + 7683984 = 4602^2 + 2772^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28862389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 400831 + ... + 400902.

Almost surely, 2^28862388 is an apocalyptic number.

It is an amenable number.

28862388 is an abundant number, since it is smaller than the sum of its proper divisors (44095406).

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

28862388 is a wasteful number, since it uses less digits than its factorization.

28862388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801743 (or 801738 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 28862388 is about 5372.3726601940. The cubic root of 28862388 is about 306.7449490344.

The spelling of 28862388 in words is "twenty-eight million, eight hundred sixty-two thousand, three hundred eighty-eight".