128297380 has 24 divisors (see below), whose sum is σ = 275692032. Its totient is φ = 50125152.

The previous prime is 128297369. The next prime is 128297413. The reversal of 128297380 is 83792821.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73732 + ... + 75451.

It is an arithmetic number, because the mean of its divisors is an integer number (11487168).

Almost surely, 2^128297380 is an apocalyptic number.

128297380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128297380 is an abundant number, since it is smaller than the sum of its proper divisors (147394652).

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

128297380 is a wasteful number, since it uses less digits than its factorization.

128297380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149235 (or 149233 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 128297380 is about 11326.8433378413. The cubic root of 128297380 is about 504.3584048924.

The spelling of 128297380 in words is "one hundred twenty-eight million, two hundred ninety-seven thousand, three hundred eighty".