222628406 has 64 divisors (see below), whose sum is σ = 455970816. Its totient is φ = 78710400.

The previous prime is 222628403. The next prime is 222628409. The reversal of 222628406 is 604826222.

It is an interprime number because it is at equal distance from previous prime (222628403) and next prime (222628409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222628403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121211 + ... + 123033.

It is an arithmetic number, because the mean of its divisors is an integer number (7124544).

Almost surely, 2^222628406 is an apocalyptic number.

222628406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

222628406 is an abundant number, since it is smaller than the sum of its proper divisors (233342410).

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

222628406 is a wasteful number, since it uses less digits than its factorization.

222628406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 222628406 is about 14920.7374482631. The cubic root of 222628406 is about 606.0756821104.

The spelling of 222628406 in words is "two hundred twenty-two million, six hundred twenty-eight thousand, four hundred six".