123355590 has 16 divisors (see below), whose sum is σ = 296053488. Its totient is φ = 32894816.

The previous prime is 123355571. The next prime is 123355633. The reversal of 123355590 is 95553321.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055897 + ... + 2055956.

It is an arithmetic number, because the mean of its divisors is an integer number (18503343).

Almost surely, 2^123355590 is an apocalyptic number.

123355590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123355590 is an abundant number, since it is smaller than the sum of its proper divisors (172697898).

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

123355590 is a wasteful number, since it uses less digits than its factorization.

123355590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111863.

The product of its (nonzero) digits is 20250, while the sum is 33.

The square root of 123355590 is about 11106.5561719194. The cubic root of 123355590 is about 497.7977679217.

The spelling of 123355590 in words is "one hundred twenty-three million, three hundred fifty-five thousand, five hundred ninety".