122887980 has 72 divisors (see below), whose sum is σ = 381453072. Its totient is φ = 32006016.

The previous prime is 122887979. The next prime is 122887987. The reversal of 122887980 is 89788221.

It is a happy number.

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 not an unprimeable number, because it can be changed into a prime (122887987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199 + ... + 15678.

Almost surely, 2^122887980 is an apocalyptic number.

122887980 is a gapful number since it is divisible by the number (10) 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 122887980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190726536).

122887980 is an abundant number, since it is smaller than the sum of its proper divisors (258565092).

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

122887980 is a wasteful number, since it uses less digits than its factorization.

122887980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15935 (or 15930 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 122887980 is about 11085.4851044057. The cubic root of 122887980 is about 497.1679627489.

The spelling of 122887980 in words is "one hundred twenty-two million, eight hundred eighty-seven thousand, nine hundred eighty".