30813994 has 8 divisors (see below), whose sum is σ = 46461060. Its totient is φ = 15326976.

The previous prime is 30813977. The next prime is 30814033. The reversal of 30813994 is 49931803.

It can be written as a sum of positive squares in 2 ways, for example, as 30525625 + 288369 = 5525^2 + 537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39529 + ... + 40300.

Almost surely, 2^30813994 is an apocalyptic number.

30813994 is a deficient number, since it is larger than the sum of its proper divisors (15647066).

30813994 is a wasteful number, since it uses less digits than its factorization.

30813994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80024.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 30813994 is about 5551.0353989143. The cubic root of 30813994 is about 313.5085080026.

It can be divided in two parts, 3081399 and 4, that added together give a triangular number (3081403 = T₂₄₈₂).

The spelling of 30813994 in words is "thirty million, eight hundred thirteen thousand, nine hundred ninety-four".