123995880 has 256 divisors, whose sum is σ = 443232000. Its totient is φ = 30772224.

The previous prime is 123995873. The next prime is 123995897. The reversal of 123995880 is 88599321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1158787 + ... + 1158893.

It is an arithmetic number, because the mean of its divisors is an integer number (1731375).

Almost surely, 2^123995880 is an apocalyptic number.

123995880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123995880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221616000).

123995880 is an abundant number, since it is smaller than the sum of its proper divisors (319236120).

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

123995880 is a wasteful number, since it uses less digits than its factorization.

123995880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 123995880 is about 11135.3437306623. The cubic root of 123995880 is about 498.6575723349.

The spelling of 123995880 in words is "one hundred twenty-three million, nine hundred ninety-five thousand, eight hundred eighty".