122657478 has 16 divisors (see below), whose sum is σ = 245879040. Its totient is φ = 40791816.

The previous prime is 122657477. The next prime is 122657569. The reversal of 122657478 is 874756221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122657471) 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, 20650 + ... + 25917.

It is an arithmetic number, because the mean of its divisors is an integer number (15367440).

Almost surely, 2^122657478 is an apocalyptic number.

122657478 is an abundant number, since it is smaller than the sum of its proper divisors (123221562).

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

122657478 is a wasteful number, since it uses less digits than its factorization.

122657478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47011.

The product of its digits is 188160, while the sum is 42.

The square root of 122657478 is about 11075.0836565689. The cubic root of 122657478 is about 496.8569208405.

The spelling of 122657478 in words is "one hundred twenty-two million, six hundred fifty-seven thousand, four hundred seventy-eight".