30765920 has 48 divisors (see below), whose sum is σ = 76966848. Its totient is φ = 11581440.

The previous prime is 30765893. The next prime is 30765947. The reversal of 30765920 is 2956703.

It is an interprime number because it is at equal distance from previous prime (30765893) and next prime (30765947).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (1603476).

Almost surely, 2^30765920 is an apocalyptic number.

It is an amenable number.

30765920 is an abundant number, since it is smaller than the sum of its proper divisors (46200928).

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

30765920 is a wasteful number, since it uses less digits than its factorization.

30765920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11343 (or 11335 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 30765920 is about 5546.7035255186. The cubic root of 30765920 is about 313.3453845775.

The spelling of 30765920 in words is "thirty million, seven hundred sixty-five thousand, nine hundred twenty".