123161880 has 64 divisors (see below), whose sum is σ = 370344960. Its totient is φ = 32766848.

The previous prime is 123161861. The next prime is 123161887. The reversal of 123161880 is 88161321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123161887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66649 + ... + 68471.

It is an arithmetic number, because the mean of its divisors is an integer number (5786640).

Almost surely, 2^123161880 is an apocalyptic number.

123161880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123161880 is an abundant number, since it is smaller than the sum of its proper divisors (247183080).

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

123161880 is a wasteful number, since it uses less digits than its factorization.

123161880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 123161880 is about 11097.8322207537. The cubic root of 123161880 is about 497.5370611179.

It can be divided in two parts, 12316 and 1880, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 123161880 in words is "one hundred twenty-three million, one hundred sixty-one thousand, eight hundred eighty".