123152240 has 20 divisors (see below), whose sum is σ = 286329144. Its totient is φ = 49260864.

The previous prime is 123152221. The next prime is 123152257. The reversal of 123152240 is 42251321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769622 + ... + 769781.

Almost surely, 2^123152240 is an apocalyptic number.

123152240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123152240 is an abundant number, since it is smaller than the sum of its proper divisors (163176904).

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

123152240 is a wasteful number, since it uses less digits than its factorization.

123152240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539416 (or 1539410 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123152240 is about 11097.3978932000. The cubic root of 123152240 is about 497.5240798762.

The spelling of 123152240 in words is "one hundred twenty-three million, one hundred fifty-two thousand, two hundred forty".