31378929120 has 1536 divisors, whose sum is σ = 150493593600. Its totient is φ = 5905612800.

The previous prime is 31378929119. The next prime is 31378929157. The reversal of 31378929120 is 2192987313.

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

It is a congruent number.

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, 175301191 + ... + 175301369.

It is an arithmetic number, because the mean of its divisors is an integer number (97977600).

Almost surely, 2^31378929120 is an apocalyptic number.

31378929120 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 31378929120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75246796800).

31378929120 is an abundant number, since it is smaller than the sum of its proper divisors (119114664480).

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

31378929120 is a wasteful number, since it uses less digits than its factorization.

31378929120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 31378929120 in words is "thirty-one billion, three hundred seventy-eight million, nine hundred twenty-nine thousand, one hundred twenty".