727888428 has 36 divisors (see below), whose sum is σ = 1871131080. Its totient is φ = 238516416.

The previous prime is 727888387. The next prime is 727888433. The reversal of 727888428 is 824888727.

727888428 is a `hidden beast` number, since 72 + 78 + 88 + 428 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×727888428² = 1059643127232622368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169225 + ... + 173472.

Almost surely, 2^727888428 is an apocalyptic number.

It is an amenable number.

727888428 is an abundant number, since it is smaller than the sum of its proper divisors (1143242652).

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

727888428 is a wasteful number, since it uses less digits than its factorization.

727888428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342766 (or 342761 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 54.

The square root of 727888428 is about 26979.4074805211. The cubic root of 727888428 is about 899.5423302673.

The spelling of 727888428 in words is "seven hundred twenty-seven million, eight hundred eighty-eight thousand, four hundred twenty-eight".