123149910 has 64 divisors (see below), whose sum is σ = 319580352. Its totient is φ = 30191616.

The previous prime is 123149909. The next prime is 123149941. The reversal of 123149910 is 19941321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130962 + ... + 131898.

It is an arithmetic number, because the mean of its divisors is an integer number (4993443).

Almost surely, 2^123149910 is an apocalyptic number.

123149910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123149910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159790176).

123149910 is an abundant number, since it is smaller than the sum of its proper divisors (196430442).

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

123149910 is a wasteful number, since it uses less digits than its factorization.

123149910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 123149910 is about 11097.2929131388. The cubic root of 123149910 is about 497.5209421923.

The spelling of 123149910 in words is "one hundred twenty-three million, one hundred forty-nine thousand, nine hundred ten".