28442147904 has 63 divisors (see below), whose sum is σ = 81535884807. Its totient is φ = 9479366784.

The previous prime is 28442147897. The next prime is 28442147941. The reversal of 28442147904 is 40974124482.

The square root of 28442147904 is 168648.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 28442147904.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4044039 + ... + 4051065.

Almost surely, 2^28442147904 is an apocalyptic number.

28442147904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

28442147904 is the 168648-th square number.

It is an amenable number.

28442147904 is an abundant number, since it is smaller than the sum of its proper divisors (53093736903).

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

28442147904 is an frugal number, since it uses more digits than its factorization.

28442147904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14072 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 28442147904 in words is "twenty-eight billion, four hundred forty-two million, one hundred forty-seven thousand, nine hundred four".