120731738490 has 512 divisors, whose sum is σ = 384262548480. Its totient is φ = 26978365440.

The previous prime is 120731738489. The next prime is 120731738521. The reversal of 120731738490 is 94837137021.

120731738490 is a `hidden beast` number, since 1 + 20 + 73 + 1 + 73 + 8 + 490 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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, 216753292 + ... + 216753848.

It is an arithmetic number, because the mean of its divisors is an integer number (750512790).

Almost surely, 2^120731738490 is an apocalyptic number.

120731738490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 120731738490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192131274240).

120731738490 is an abundant number, since it is smaller than the sum of its proper divisors (263530809990).

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

120731738490 is a wasteful number, since it uses less digits than its factorization.

120731738490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 120731738490 in words is "one hundred twenty billion, seven hundred thirty-one million, seven hundred thirty-eight thousand, four hundred ninety".