28801550 has 12 divisors (see below), whose sum is σ = 53570976. Its totient is φ = 11520600.

The previous prime is 28801547. The next prime is 28801603. The reversal of 28801550 is 5510882.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 287966 + ... + 288065.

It is an arithmetic number, because the mean of its divisors is an integer number (4464248).

Almost surely, 2^28801550 is an apocalyptic number.

28801550 is a deficient number, since it is larger than the sum of its proper divisors (24769426).

28801550 is a wasteful number, since it uses less digits than its factorization.

28801550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576043 (or 576038 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 28801550 is about 5366.7075567800. The cubic root of 28801550 is about 306.5292718385.

The spelling of 28801550 in words is "twenty-eight million, eight hundred one thousand, five hundred fifty".