89399728 has 20 divisors (see below), whose sum is σ = 188958888. Its totient is φ = 40636160.

The previous prime is 89399707. The next prime is 89399747. The reversal of 89399728 is 82799398.

It is a super-2 number, since 2×89399728² = 15984622732947968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253801 + ... + 254152.

Almost surely, 2^89399728 is an apocalyptic number.

89399728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

89399728 is an abundant number, since it is smaller than the sum of its proper divisors (99559160).

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

89399728 is a wasteful number, since it uses less digits than its factorization.

89399728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507972 (or 507966 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The square root of 89399728 is about 9455.1429391628. The cubic root of 89399728 is about 447.1419321836.

The spelling of 89399728 in words is "eighty-nine million, three hundred ninety-nine thousand, seven hundred twenty-eight".