128926380 has 48 divisors (see below), whose sum is σ = 393813504. Its totient is φ = 31254720.

The previous prime is 128926327. The next prime is 128926403. The reversal of 128926380 is 83629821.

It is a happy number.

It is a super-2 number, since 2×128926380² = 33244022919808800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 97012 + ... + 98331.

It is an arithmetic number, because the mean of its divisors is an integer number (8204448).

Almost surely, 2^128926380 is an apocalyptic number.

128926380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128926380 is an abundant number, since it is smaller than the sum of its proper divisors (264887124).

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

128926380 is a wasteful number, since it uses less digits than its factorization.

128926380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195366 (or 195364 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128926380 is about 11354.5752892832. The cubic root of 128926380 is about 505.1812962109.

The spelling of 128926380 in words is "one hundred twenty-eight million, nine hundred twenty-six thousand, three hundred eighty".