122578998 has 16 divisors (see below), whose sum is σ = 253612080. Its totient is φ = 39450656.

The previous prime is 122578949. The next prime is 122578999. The reversal of 122578998 is 899875221.

It is a super-2 number, since 2×122578998² = 30051221501368008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122578998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122578999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352065 + ... + 352412.

It is an arithmetic number, because the mean of its divisors is an integer number (15850755).

Almost surely, 2^122578998 is an apocalyptic number.

122578998 is an abundant number, since it is smaller than the sum of its proper divisors (131033082).

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

122578998 is a wasteful number, since it uses less digits than its factorization.

122578998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704511.

The product of its digits is 725760, while the sum is 51.

The square root of 122578998 is about 11071.5400012826. The cubic root of 122578998 is about 496.7509301552.

The spelling of 122578998 in words is "one hundred twenty-two million, five hundred seventy-eight thousand, nine hundred ninety-eight".