128753380 has 36 divisors (see below), whose sum is σ = 314528508. Its totient is φ = 44143680.

The previous prime is 128753369. The next prime is 128753381. The reversal of 128753380 is 83357821.

It can be written as a sum of positive squares in 2 ways, for example, as 87459904 + 41293476 = 9352^2 + 6426^2 .

It is a super-2 number, since 2×128753380² = 33154865722848800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128753381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64711 + ... + 66670.

It is an arithmetic number, because the mean of its divisors is an integer number (8736903).

Almost surely, 2^128753380 is an apocalyptic number.

128753380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128753380 is an abundant number, since it is smaller than the sum of its proper divisors (185775128).

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

128753380 is a wasteful number, since it uses less digits than its factorization.

128753380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131404 (or 131395 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 128753380 is about 11346.9546575282. The cubic root of 128753380 is about 504.9552357145.

The spelling of 128753380 in words is "one hundred twenty-eight million, seven hundred fifty-three thousand, three hundred eighty".