122272578 has 60 divisors (see below), whose sum is σ = 281452050. Its totient is φ = 39674880.

The previous prime is 122272567. The next prime is 122272583. The reversal of 122272578 is 875272221.

122272578 is a `hidden beast` number, since 12 + 2 + 2 + 72 + 578 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 47155689 + 75116889 = 6867^2 + 8667^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 272098 + ... + 272546.

Almost surely, 2^122272578 is an apocalyptic number.

122272578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 122272578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140726025).

122272578 is an abundant number, since it is smaller than the sum of its proper divisors (159179472).

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

122272578 is an equidigital number, since it uses as much as digits as its factorization.

122272578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 495 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 122272578 is about 11057.6931590635. The cubic root of 122272578 is about 496.3366628040.

The spelling of 122272578 in words is "one hundred twenty-two million, two hundred seventy-two thousand, five hundred seventy-eight".