28888888731460 has 48 divisors (see below), whose sum is σ = 61723051190640. Its totient is φ = 11354719357440.

The previous prime is 28888888731421. The next prime is 28888888731503. The reversal of 28888888731460 is 6413788888882.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1125958676544 + 27762930054916 = 1061112^2 + 5269054^2 .

It is a Smith number, since the sum of its digits (79) coincides with the sum of the digits of its prime factors.

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, 10658995 + ... + 13091674.

It is an arithmetic number, because the mean of its divisors is an integer number (1285896899805).

Almost surely, 2^{28888888731460} is an apocalyptic number.

28888888731460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28888888731460 is an abundant number, since it is smaller than the sum of its proper divisors (32834162459180).

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

28888888731460 is a wasteful number, since it uses less digits than its factorization.

28888888731460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23751736 (or 23751734 counting only the distinct ones).

The product of its (nonzero) digits is 2113929216, while the sum is 79.

The spelling of 28888888731460 in words is "twenty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, seven hundred thirty-one thousand, four hundred sixty".