128714520 has 64 divisors (see below), whose sum is σ = 421251840. Its totient is φ = 31203200.

The previous prime is 128714519. The next prime is 128714533. The reversal of 128714520 is 25417821.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47436 + ... + 50075.

It is an arithmetic number, because the mean of its divisors is an integer number (6582060).

Almost surely, 2^128714520 is an apocalyptic number.

128714520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128714520 is an abundant number, since it is smaller than the sum of its proper divisors (292537320).

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

128714520 is a wasteful number, since it uses less digits than its factorization.

128714520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97536 (or 97532 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 128714520 is about 11345.2421745858. The cubic root of 128714520 is about 504.9044291909.

It can be divided in two parts, 12871 and 4520, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 128714520 in words is "one hundred twenty-eight million, seven hundred fourteen thousand, five hundred twenty".