123708990 has 16 divisors (see below), whose sum is σ = 296901648. Its totient is φ = 32989056.

The previous prime is 123708989. The next prime is 123709009. The reversal of 123708990 is 99807321.

It is a congruent number.

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, 2061787 + ... + 2061846.

It is an arithmetic number, because the mean of its divisors is an integer number (18556353).

Almost surely, 2^123708990 is an apocalyptic number.

123708990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123708990 is an abundant number, since it is smaller than the sum of its proper divisors (173192658).

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

123708990 is a wasteful number, since it uses less digits than its factorization.

123708990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123643.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 123708990 is about 11122.4543154827. The cubic root of 123708990 is about 498.2726930260.

The spelling of 123708990 in words is "one hundred twenty-three million, seven hundred eight thousand, nine hundred ninety".