30928830 has 32 divisors (see below), whose sum is σ = 75450528. Its totient is φ = 8112000.

The previous prime is 30928823. The next prime is 30928837. The reversal of 30928830 is 3882903.

It is an interprime number because it is at equal distance from previous prime (30928823) and next prime (30928837).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30928791 and 30928800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30928837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 10280.

It is an arithmetic number, because the mean of its divisors is an integer number (2357829).

Almost surely, 2^30928830 is an apocalyptic number.

30928830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30928830 is an abundant number, since it is smaller than the sum of its proper divisors (44521698).

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

30928830 is a wasteful number, since it uses less digits than its factorization.

30928830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16972.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 30928830 is about 5561.3694356696. The cubic root of 30928830 is about 313.8974809678.

The spelling of 30928830 in words is "thirty million, nine hundred twenty-eight thousand, eight hundred thirty".