122257428 has 48 divisors (see below), whose sum is σ = 301357056. Its totient is φ = 38515680.

The previous prime is 122257427. The next prime is 122257463. The reversal of 122257428 is 824752221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122257427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12175 + ... + 19817.

It is an arithmetic number, because the mean of its divisors is an integer number (6278272).

Almost surely, 2^122257428 is an apocalyptic number.

It is an amenable number.

122257428 is an abundant number, since it is smaller than the sum of its proper divisors (179099628).

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

122257428 is a wasteful number, since it uses less digits than its factorization.

122257428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724 (or 7722 counting only the distinct ones).

The product of its digits is 17920, while the sum is 33.

The square root of 122257428 is about 11057.0080944169. The cubic root of 122257428 is about 496.3161626746.

The spelling of 122257428 in words is "one hundred twenty-two million, two hundred fifty-seven thousand, four hundred twenty-eight".