657428222 has 32 divisors (see below), whose sum is σ = 1112776704. Its totient is φ = 288597600.

The previous prime is 657428221. The next prime is 657428227. The reversal of 657428222 is 222824756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657428221) 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, 588008 + ... + 589124.

It is an arithmetic number, because the mean of its divisors is an integer number (34774272).

Almost surely, 2^657428222 is an apocalyptic number.

657428222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

657428222 is a deficient number, since it is larger than the sum of its proper divisors (455348482).

657428222 is a wasteful number, since it uses less digits than its factorization.

657428222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its digits is 107520, while the sum is 38.

The square root of 657428222 is about 25640.3631409541. The cubic root of 657428222 is about 869.5264177280.

The spelling of 657428222 in words is "six hundred fifty-seven million, four hundred twenty-eight thousand, two hundred twenty-two".