30102990 has 16 divisors (see below), whose sum is σ = 72247248. Its totient is φ = 8027456.

The previous prime is 30102959. The next prime is 30102991. The reversal of 30102990 is 9920103.

It is a happy number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 30102990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102991) 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, 501687 + ... + 501746.

It is an arithmetic number, because the mean of its divisors is an integer number (4515453).

Almost surely, 2^30102990 is an apocalyptic number.

30102990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30102990 is an abundant number, since it is smaller than the sum of its proper divisors (42144258).

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

30102990 is a wasteful number, since it uses less digits than its factorization.

30102990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003443.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 30102990 is about 5486.6191775993. The cubic root of 30102990 is about 311.0784154510.

The spelling of 30102990 in words is "thirty million, one hundred two thousand, nine hundred ninety".