30999492 has 72 divisors (see below), whose sum is σ = 84651840. Its totient is φ = 9535680.

The previous prime is 30999457. The next prime is 30999499. The reversal of 30999492 is 29499903.

It is not an unprimeable number, because it can be changed into a prime (30999499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23367 + ... + 24657.

It is an arithmetic number, because the mean of its divisors is an integer number (1175720).

Almost surely, 2^30999492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30999492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42325920).

30999492 is an abundant number, since it is smaller than the sum of its proper divisors (53652348).

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

30999492 is a wasteful number, since it uses less digits than its factorization.

30999492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 30999492 is about 5567.7187428964. The cubic root of 30999492 is about 314.1363492928.

The spelling of 30999492 in words is "thirty million, nine hundred ninety-nine thousand, four hundred ninety-two".