30499812 has 72 divisors (see below), whose sum is σ = 88897536. Its totient is φ = 8636544.

The previous prime is 30499811. The next prime is 30499829. The reversal of 30499812 is 21899403.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30499811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31528 + ... + 32480.

It is an arithmetic number, because the mean of its divisors is an integer number (1234688).

Almost surely, 2^30499812 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 30499812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44448768).

30499812 is an abundant number, since it is smaller than the sum of its proper divisors (58397724).

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

30499812 is a wasteful number, since it uses less digits than its factorization.

30499812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 30499812 is about 5522.6634878471. The cubic root of 30499812 is about 312.4393465218.

The spelling of 30499812 in words is "thirty million, four hundred ninety-nine thousand, eight hundred twelve".