30420988 has 12 divisors (see below), whose sum is σ = 57331960. Its totient is φ = 14040432.

The previous prime is 30420983. The next prime is 30420989. The reversal of 30420988 is 88902403.

It is a super-2 number, since 2×30420988² = 1850873021792288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292458 + ... + 292561.

Almost surely, 2^30420988 is an apocalyptic number.

It is an amenable number.

30420988 is a deficient number, since it is larger than the sum of its proper divisors (26910972).

30420988 is a wasteful number, since it uses less digits than its factorization.

30420988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585036 (or 585034 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 30420988 is about 5515.5224593868. The cubic root of 30420988 is about 312.1699572591.

The spelling of 30420988 in words is "thirty million, four hundred twenty thousand, nine hundred eighty-eight".