123428236 has 24 divisors (see below), whose sum is σ = 226759680. Its totient is φ = 58707600.

The previous prime is 123428233. The next prime is 123428243. The reversal of 123428236 is 632824321.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 123428198 and 123428207.

It is not an unprimeable number, because it can be changed into a prime (123428231) 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, 1120 + ... + 15751.

It is an arithmetic number, because the mean of its divisors is an integer number (9448320).

Almost surely, 2^123428236 is an apocalyptic number.

It is an amenable number.

123428236 is a deficient number, since it is larger than the sum of its proper divisors (103331444).

123428236 is a wasteful number, since it uses less digits than its factorization.

123428236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16965 (or 16963 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 123428236 is about 11109.8261012493. The cubic root of 123428236 is about 497.8954689932.

The spelling of 123428236 in words is "one hundred twenty-three million, four hundred twenty-eight thousand, two hundred thirty-six".