30781404780 has 48 divisors (see below), whose sum is σ = 98500496640. Its totient is φ = 7035749568.

The previous prime is 30781404769. The next prime is 30781404793. The reversal of 30781404780 is 8740418703.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36644110 + ... + 36644949.

It is an arithmetic number, because the mean of its divisors is an integer number (2052093680).

Almost surely, 2^30781404780 is an apocalyptic number.

30781404780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30781404780 is an abundant number, since it is smaller than the sum of its proper divisors (67719091860).

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

30781404780 is a wasteful number, since it uses less digits than its factorization.

30781404780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73289078 (or 73289076 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 30781404780 in words is "thirty billion, seven hundred eighty-one million, four hundred four thousand, seven hundred eighty".