30513998 has 8 divisors (see below), whose sum is σ = 46744992. Its totient is φ = 14932336.

The previous prime is 30513991. The next prime is 30514007. The reversal of 30513998 is 89931503.

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

It is a super-2 number, since 2×30513998² = 1862208147888008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30513991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162215 + ... + 162402.

It is an arithmetic number, because the mean of its divisors is an integer number (5843124).

Almost surely, 2^30513998 is an apocalyptic number.

30513998 is a deficient number, since it is larger than the sum of its proper divisors (16230994).

30513998 is a wasteful number, since it uses less digits than its factorization.

30513998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324666.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 30513998 is about 5523.9476825908. The cubic root of 30513998 is about 312.4877793621.

The spelling of 30513998 in words is "thirty million, five hundred thirteen thousand, nine hundred ninety-eight".