30199998 has 16 divisors (see below), whose sum is σ = 60673536. Its totient is φ = 10021080.

The previous prime is 30199997. The next prime is 30199999. The reversal of 30199998 is 89999103.

It is an interprime number because it is at equal distance from previous prime (30199997) and next prime (30199999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30199997) 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, 9948 + ... + 12623.

It is an arithmetic number, because the mean of its divisors is an integer number (3792096).

Almost surely, 2^30199998 is an apocalyptic number.

30199998 is an abundant number, since it is smaller than the sum of its proper divisors (30473538).

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

30199998 is a wasteful number, since it uses less digits than its factorization.

30199998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22799.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 30199998 is about 5495.4524836450. The cubic root of 30199998 is about 311.4122110555.

It can be divided in two parts, 30 and 199998, that added together give a triangular number (200028 = T₆₃₂).

The spelling of 30199998 in words is "thirty million, one hundred ninety-nine thousand, nine hundred ninety-eight".