30903966 has 48 divisors (see below), whose sum is σ = 70302960. Its totient is φ = 9797760.

The previous prime is 30903959. The next prime is 30903989. The reversal of 30903966 is 66930903.

It is a super-2 number, since 2×30903966² = 1910110229058312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30903966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37701 + ... + 38511.

It is an arithmetic number, because the mean of its divisors is an integer number (1464645).

Almost surely, 2^30903966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30903966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35151480).

30903966 is an abundant number, since it is smaller than the sum of its proper divisors (39398994).

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

30903966 is a wasteful number, since it uses less digits than its factorization.

30903966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 30903966 is about 5559.1335655838. The cubic root of 30903966 is about 313.8133432950.

It can be divided in two parts, 3090 and 3966, that added together give a square (7056 = 84²).

The spelling of 30903966 in words is "thirty million, nine hundred three thousand, nine hundred sixty-six".