30990330 has 128 divisors (see below), whose sum is σ = 99532800. Its totient is φ = 6702912.

The previous prime is 30990329. The next prime is 30990353. The reversal of 30990330 is 3309903.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 30990294 and 30990303.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35479 + ... + 36341.

It is an arithmetic number, because the mean of its divisors is an integer number (777600).

Almost surely, 2^30990330 is an apocalyptic number.

30990330 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 30990330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49766400).

30990330 is an abundant number, since it is smaller than the sum of its proper divisors (68542470).

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

30990330 is a wasteful number, since it uses less digits than its factorization.

30990330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 30990330 is about 5566.8959034636. The cubic root of 30990330 is about 314.1053982391.

The spelling of 30990330 in words is "thirty million, nine hundred ninety thousand, three hundred thirty".