128157400 has 48 divisors (see below), whose sum is σ = 340536240. Its totient is φ = 43939200.

The previous prime is 128157397. The next prime is 128157461. The reversal of 128157400 is 4751821.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 44371 + ... + 47170.

It is an arithmetic number, because the mean of its divisors is an integer number (7094505).

Almost surely, 2^128157400 is an apocalyptic number.

128157400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128157400 is an abundant number, since it is smaller than the sum of its proper divisors (212378840).

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

128157400 is a wasteful number, since it uses less digits than its factorization.

128157400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91564 (or 91555 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 128157400 is about 11320.6625247818. The cubic root of 128157400 is about 504.1749098972.

The spelling of 128157400 in words is "one hundred twenty-eight million, one hundred fifty-seven thousand, four hundred".