28188150984 has 80 divisors (see below), whose sum is σ = 90231926400. Its totient is φ = 8053756128.

The previous prime is 28188150979. The next prime is 28188151051. The reversal of 28188150984 is 48905188182.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 28188150984.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3102624 + ... + 3111695.

It is an arithmetic number, because the mean of its divisors is an integer number (1127899080).

Almost surely, 2^28188150984 is an apocalyptic number.

28188150984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28188150984 is an abundant number, since it is smaller than the sum of its proper divisors (62043775416).

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

28188150984 is a wasteful number, since it uses less digits than its factorization.

28188150984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214344 (or 6214331 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 54.

The spelling of 28188150984 in words is "twenty-eight billion, one hundred eighty-eight million, one hundred fifty thousand, nine hundred eighty-four".