31118929380 has 768 divisors, whose sum is σ = 124853944320. Its totient is φ = 6248793600.

The previous prime is 31118929339. The next prime is 31118929397. The reversal of 31118929380 is 8392981113.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 245030877 + ... + 245031003.

It is an arithmetic number, because the mean of its divisors is an integer number (162570240).

Almost surely, 2^31118929380 is an apocalyptic number.

31118929380 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 31118929380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62426972160).

31118929380 is an abundant number, since it is smaller than the sum of its proper divisors (93735014940).

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

31118929380 is a wasteful number, since it uses less digits than its factorization.

31118929380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 31118929380 in words is "thirty-one billion, one hundred eighteen million, nine hundred twenty-nine thousand, three hundred eighty".