122788720 has 40 divisors (see below), whose sum is σ = 297900576. Its totient is φ = 46979328.

The previous prime is 122788703. The next prime is 122788741. The reversal of 122788720 is 27887221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 122788720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31527 + ... + 35206.

Almost surely, 2^122788720 is an apocalyptic number.

122788720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122788720 is an abundant number, since it is smaller than the sum of its proper divisors (175111856).

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

122788720 is a wasteful number, since it uses less digits than its factorization.

122788720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66769 (or 66763 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 122788720 is about 11081.0071744404. The cubic root of 122788720 is about 497.0340679482.

The spelling of 122788720 in words is "one hundred twenty-two million, seven hundred eighty-eight thousand, seven hundred twenty".