30145998 has 32 divisors (see below), whose sum is σ = 64101024. Its totient is φ = 9418752.

The previous prime is 30145987. The next prime is 30146057. The reversal of 30145998 is 89954103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33936 + ... + 34812.

It is an arithmetic number, because the mean of its divisors is an integer number (2003157).

Almost surely, 2^30145998 is an apocalyptic number.

30145998 is an abundant number, since it is smaller than the sum of its proper divisors (33955026).

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

30145998 is a wasteful number, since it uses less digits than its factorization.

30145998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 30145998 is about 5490.5371321939. The cubic root of 30145998 is about 311.2264903776.

The spelling of 30145998 in words is "thirty million, one hundred forty-five thousand, nine hundred ninety-eight".