30675720 has 64 divisors (see below), whose sum is σ = 92975040. Its totient is φ = 8096000.

The previous prime is 30675713. The next prime is 30675731. The reversal of 30675720 is 2757603.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10855 + ... + 13385.

It is an arithmetic number, because the mean of its divisors is an integer number (1452735).

Almost surely, 2^30675720 is an apocalyptic number.

30675720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30675720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46487520).

30675720 is an abundant number, since it is smaller than the sum of its proper divisors (62299320).

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

30675720 is a wasteful number, since it uses less digits than its factorization.

30675720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 30675720 is about 5538.5666015676. The cubic root of 30675720 is about 313.0388612108.

The spelling of 30675720 in words is "thirty million, six hundred seventy-five thousand, seven hundred twenty".