123456628 has 6 divisors (see below), whose sum is σ = 216049106. Its totient is φ = 61728312.

The previous prime is 123456611. The next prime is 123456629. The reversal of 123456628 is 826654321.

It can be written as a sum of positive squares in only one way, i.e., 77053284 + 46403344 = 8778^2 + 6812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123456629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15432075 + ... + 15432082.

Almost surely, 2^123456628 is an apocalyptic number.

It is an amenable number.

123456628 is a deficient number, since it is larger than the sum of its proper divisors (92592478).

123456628 is a wasteful number, since it uses less digits than its factorization.

123456628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30864161 (or 30864159 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 123456628 is about 11111.1038155532. The cubic root of 123456628 is about 497.9336427662.

The spelling of 123456628 in words is "one hundred twenty-three million, four hundred fifty-six thousand, six hundred twenty-eight".