28534825990 has 32 divisors (see below), whose sum is σ = 56165840640. Its totient is φ = 10351519200.

The previous prime is 28534825987. The next prime is 28534826027. The reversal of 28534825990 is 9952843582.

It is a Harshad number since it is a multiple of its sum of digits (55).

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, 263466 + ... + 355645.

It is an arithmetic number, because the mean of its divisors is an integer number (1755182520).

Almost surely, 2^28534825990 is an apocalyptic number.

28534825990 is a deficient number, since it is larger than the sum of its proper divisors (27631014650).

28534825990 is a wasteful number, since it uses less digits than its factorization.

28534825990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619548.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 28534825990 in words is "twenty-eight billion, five hundred thirty-four million, eight hundred twenty-five thousand, nine hundred ninety".