123455790 has 24 divisors (see below), whose sum is σ = 320985288. Its totient is φ = 32921520.

The previous prime is 123455779. The next prime is 123455803. The reversal of 123455790 is 97554321.

123455790 is a `hidden beast` number, since 12 + 3 + 4 + 557 + 90 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685776 + ... + 685955.

It is an arithmetic number, because the mean of its divisors is an integer number (13374387).

Almost surely, 2^123455790 is an apocalyptic number.

123455790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123455790 is an abundant number, since it is smaller than the sum of its proper divisors (197529498).

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

123455790 is a wasteful number, since it uses less digits than its factorization.

123455790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371744 (or 1371741 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 123455790 is about 11111.0661054644. The cubic root of 123455790 is about 497.9325161375.

The spelling of 123455790 in words is "one hundred twenty-three million, four hundred fifty-five thousand, seven hundred ninety".