28890051770 has 64 divisors (see below), whose sum is σ = 56731479840. Its totient is φ = 10548191232.

The previous prime is 28890051763. The next prime is 28890051781. The reversal of 28890051770 is 7715009882.

It can be written as a sum of positive squares in 16 ways, for example, as 1452448321 + 27437603449 = 38111^2 + 165643^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1986686 + ... + 2001174.

Almost surely, 2^28890051770 is an apocalyptic number.

28890051770 is a deficient number, since it is larger than the sum of its proper divisors (27841428070).

28890051770 is a wasteful number, since it uses less digits than its factorization.

28890051770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14867.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 28890051770 in words is "twenty-eight billion, eight hundred ninety million, fifty-one thousand, seven hundred seventy".