31490426780 has 24 divisors (see below), whose sum is σ = 66872932560. Its totient is φ = 12454640000.

The previous prime is 31490426767. The next prime is 31490426783. The reversal of 31490426780 is 8762409413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31490426783) 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, 8843846 + ... + 8847405.

It is an arithmetic number, because the mean of its divisors is an integer number (2786372190).

Almost surely, 2^31490426780 is an apocalyptic number.

It is an amenable number.

31490426780 is an abundant number, since it is smaller than the sum of its proper divisors (35382505780).

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

31490426780 is a wasteful number, since it uses less digits than its factorization.

31490426780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17691349 (or 17691347 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 31490426780 in words is "thirty-one billion, four hundred ninety million, four hundred twenty-six thousand, seven hundred eighty".