30733989 has 32 divisors (see below), whose sum is σ = 49717248. Its totient is φ = 16632000.

The previous prime is 30733979. The next prime is 30733991. The reversal of 30733989 is 98933703.

It is a happy number.

It is not a de Polignac number, because 30733989 - 2⁴ = 30733973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30733989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30733919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12144 + ... + 14454.

It is an arithmetic number, because the mean of its divisors is an integer number (1553664).

Almost surely, 2^30733989 is an apocalyptic number.

30733989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

30733989 is a deficient number, since it is larger than the sum of its proper divisors (18983259).

30733989 is a wasteful number, since it uses less digits than its factorization.

30733989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 30733989 is about 5543.8244019810. The cubic root of 30733989 is about 313.2369432143.

The spelling of 30733989 in words is "thirty million, seven hundred thirty-three thousand, nine hundred eighty-nine".