30967281990 has 128 divisors (see below), whose sum is σ = 85924540800. Its totient is φ = 7926750720.

The previous prime is 30967281977. The next prime is 30967282037. The reversal of 30967281990 is 9918276903.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1343160 + ... + 1366020.

It is an arithmetic number, because the mean of its divisors is an integer number (671285475).

Almost surely, 2^30967281990 is an apocalyptic number.

30967281990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30967281990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42962270400).

30967281990 is an abundant number, since it is smaller than the sum of its proper divisors (54957258810).

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

30967281990 is a wasteful number, since it uses less digits than its factorization.

30967281990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23079 (or 23073 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 30967281990 in words is "thirty billion, nine hundred sixty-seven million, two hundred eighty-one thousand, nine hundred ninety".