128752764 has 48 divisors (see below), whose sum is σ = 363541248. Its totient is φ = 34622208.

The previous prime is 128752763. The next prime is 128752769. The reversal of 128752764 is 467257821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128752763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43654 + ... + 46509.

It is an arithmetic number, because the mean of its divisors is an integer number (7573776).

Almost surely, 2^128752764 is an apocalyptic number.

128752764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128752764 is an abundant number, since it is smaller than the sum of its proper divisors (234788484).

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

128752764 is a wasteful number, since it uses less digits than its factorization.

128752764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90194 (or 90192 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 128752764 is about 11346.9275136488. The cubic root of 128752764 is about 504.9544304206.

The spelling of 128752764 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, seven hundred sixty-four".