123157400 has 48 divisors (see below), whose sum is σ = 287258400. Its totient is φ = 49105280.

The previous prime is 123157379. The next prime is 123157427. The reversal of 123157400 is 4751321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77009 + ... + 78591.

It is an arithmetic number, because the mean of its divisors is an integer number (5984550).

Almost surely, 2^123157400 is an apocalyptic number.

123157400 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 123157400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143629200).

123157400 is an abundant number, since it is smaller than the sum of its proper divisors (164101000).

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

123157400 is a wasteful number, since it uses less digits than its factorization.

123157400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 123157400 is about 11097.6303776978. The cubic root of 123157400 is about 497.5310284259.

The spelling of 123157400 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, four hundred".