30953990 has 16 divisors (see below), whose sum is σ = 56144880. Its totient is φ = 12286560.

The previous prime is 30953987. The next prime is 30953999. The reversal of 30953990 is 9935903.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30953999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10505 + ... + 13124.

It is an arithmetic number, because the mean of its divisors is an integer number (3509055).

Almost surely, 2^30953990 is an apocalyptic number.

30953990 is a deficient number, since it is larger than the sum of its proper divisors (25190890).

30953990 is a wasteful number, since it uses less digits than its factorization.

30953990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23767.

The product of its (nonzero) digits is 32805, while the sum is 38.

The square root of 30953990 is about 5563.6310086130. The cubic root of 30953990 is about 313.9825743910.

The spelling of 30953990 in words is "thirty million, nine hundred fifty-three thousand, nine hundred ninety".