128857480 has 16 divisors (see below), whose sum is σ = 289929420. Its totient is φ = 51542976.

The previous prime is 128857471. The next prime is 128857481. The reversal of 128857480 is 84758821.

It can be written as a sum of positive squares in 2 ways, for example, as 115476516 + 13380964 = 10746^2 + 3658^2 .

It is not an unprimeable number, because it can be changed into a prime (128857481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610679 + ... + 1610758.

Almost surely, 2^128857480 is an apocalyptic number.

128857480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128857480 is an abundant number, since it is smaller than the sum of its proper divisors (161071940).

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

128857480 is a wasteful number, since it uses less digits than its factorization.

128857480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221448 (or 3221444 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 43.

The square root of 128857480 is about 11351.5408645699. The cubic root of 128857480 is about 505.0912882710.

The spelling of 128857480 in words is "one hundred twenty-eight million, eight hundred fifty-seven thousand, four hundred eighty".