30808590 has 64 divisors (see below), whose sum is σ = 78947136. Its totient is φ = 7667712.

The previous prime is 30808579. The next prime is 30808619. The reversal of 30808590 is 9580803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98274 + ... + 98586.

It is an arithmetic number, because the mean of its divisors is an integer number (1233549).

Almost surely, 2^30808590 is an apocalyptic number.

30808590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30808590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39473568).

30808590 is an abundant number, since it is smaller than the sum of its proper divisors (48138546).

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

30808590 is a wasteful number, since it uses less digits than its factorization.

30808590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 30808590 is about 5550.5486215328. The cubic root of 30808590 is about 313.4901797605.

The spelling of 30808590 in words is "thirty million, eight hundred eight thousand, five hundred ninety".