428988508 has 24 divisors (see below), whose sum is σ = 830332832. Its totient is φ = 192642624.

The previous prime is 428988491. The next prime is 428988533. The reversal of 428988508 is 805889824.

It is a super-2 number, since 2×428988508² = 368062279992132128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109560 + ... + 113407.

Almost surely, 2^428988508 is an apocalyptic number.

It is an amenable number.

428988508 is a deficient number, since it is larger than the sum of its proper divisors (401344324).

428988508 is a wasteful number, since it uses less digits than its factorization.

428988508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223021 (or 223019 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The square root of 428988508 is about 20712.0377558559. The cubic root of 428988508 is about 754.1919386964.

The spelling of 428988508 in words is "four hundred twenty-eight million, nine hundred eighty-eight thousand, five hundred eight".