28801588 has 6 divisors (see below), whose sum is σ = 50402786. Its totient is φ = 14400792.

The previous prime is 28801547. The next prime is 28801603. The reversal of 28801588 is 88510882.

It can be written as a sum of positive squares in only one way, i.e., 18992164 + 9809424 = 4358^2 + 3132^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28801588.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3600195 + ... + 3600202.

Almost surely, 2^28801588 is an apocalyptic number.

It is an amenable number.

28801588 is a deficient number, since it is larger than the sum of its proper divisors (21601198).

28801588 is a wasteful number, since it uses less digits than its factorization.

28801588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200401 (or 7200399 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 28801588 is about 5366.7110971246. The cubic root of 28801588 is about 306.5294066473.

The spelling of 28801588 in words is "twenty-eight million, eight hundred one thousand, five hundred eighty-eight".