30983990 has 32 divisors (see below), whose sum is σ = 58786560. Its totient is φ = 11734624.

The previous prime is 30983971. The next prime is 30983999. The reversal of 30983990 is 9938903.

30983990 = 461² + 462² + ... + 575².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30983999) 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, 23981 + ... + 25239.

It is an arithmetic number, because the mean of its divisors is an integer number (1837080).

Almost surely, 2^30983990 is an apocalyptic number.

30983990 is a deficient number, since it is larger than the sum of its proper divisors (27802570).

30983990 is a wasteful number, since it uses less digits than its factorization.

30983990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 30983990 is about 5566.3264367085. The cubic root of 30983990 is about 314.0839768899.

The spelling of 30983990 in words is "thirty million, nine hundred eighty-three thousand, nine hundred ninety".