30781436460 has 96 divisors (see below), whose sum is σ = 89683034112. Its totient is φ = 7882118400.

The previous prime is 30781436459. The next prime is 30781436503. The reversal of 30781436460 is 6463418703.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 46485 + ... + 252435.

It is an arithmetic number, because the mean of its divisors is an integer number (934198272).

Almost surely, 2^30781436460 is an apocalyptic number.

30781436460 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30781436460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44841517056).

30781436460 is an abundant number, since it is smaller than the sum of its proper divisors (58901597652).

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

30781436460 is a wasteful number, since it uses less digits than its factorization.

30781436460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206063 (or 206061 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 30781436460 in words is "thirty billion, seven hundred eighty-one million, four hundred thirty-six thousand, four hundred sixty".