30279797980 has 24 divisors (see below), whose sum is σ = 64217160000. Its totient is φ = 11991998400.

The previous prime is 30279797957. The next prime is 30279797981. The reversal of 30279797980 is 8979797203.

It is a super-2 number, since 2×30279797980² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30279797981) 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, 7492980 + ... + 7497019.

It is an arithmetic number, because the mean of its divisors is an integer number (2675715000).

Almost surely, 2^30279797980 is an apocalyptic number.

It is an amenable number.

30279797980 is an abundant number, since it is smaller than the sum of its proper divisors (33937362020).

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

30279797980 is a wasteful number, since it uses less digits than its factorization.

30279797980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14990109 (or 14990107 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 61.

The spelling of 30279797980 in words is "thirty billion, two hundred seventy-nine million, seven hundred ninety-seven thousand, nine hundred eighty".