123155760 has 160 divisors (see below), whose sum is σ = 469969920. Its totient is φ = 25979904.

The previous prime is 123155749. The next prime is 123155771. The reversal of 123155760 is 67551321.

It is an interprime number because it is at equal distance from previous prime (123155749) and next prime (123155771).

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

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, 19021 + ... + 24659.

It is an arithmetic number, because the mean of its divisors is an integer number (2937312).

Almost surely, 2^123155760 is an apocalyptic number.

123155760 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 123155760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234984960).

123155760 is an abundant number, since it is smaller than the sum of its proper divisors (346814160).

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

123155760 is a wasteful number, since it uses less digits than its factorization.

123155760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675 (or 5669 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 123155760 is about 11097.5564878040. The cubic root of 123155760 is about 497.5288199932.

The spelling of 123155760 in words is "one hundred twenty-three million, one hundred fifty-five thousand, seven hundred sixty".