123390426 has 16 divisors (see below), whose sum is σ = 247319424. Its totient is φ = 41040384.

The previous prime is 123390419. The next prime is 123390431. The reversal of 123390426 is 624093321.

It is a super-2 number, since 2×123390426² = 30450394456922952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123390393 and 123390402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19431 + ... + 24986.

It is an arithmetic number, because the mean of its divisors is an integer number (15457464).

Almost surely, 2^123390426 is an apocalyptic number.

123390426 is an abundant number, since it is smaller than the sum of its proper divisors (123928998).

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

123390426 is a wasteful number, since it uses less digits than its factorization.

123390426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44885.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 123390426 is about 11108.1243241152. The cubic root of 123390426 is about 497.8446233875.

The spelling of 123390426 in words is "one hundred twenty-three million, three hundred ninety thousand, four hundred twenty-six".