128961310 has 16 divisors (see below), whose sum is σ = 232291152. Its totient is φ = 51548800.

The previous prime is 128961307. The next prime is 128961311. The reversal of 128961310 is 13169821.

It is a super-2 number, since 2×128961310² = 33262038953832200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128961311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14550 + ... + 21670.

It is an arithmetic number, because the mean of its divisors is an integer number (14518197).

Almost surely, 2^128961310 is an apocalyptic number.

128961310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128961310 is a deficient number, since it is larger than the sum of its proper divisors (103329842).

128961310 is a wasteful number, since it uses less digits than its factorization.

128961310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8939.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 128961310 is about 11356.1133315937. The cubic root of 128961310 is about 505.2269149826.

The spelling of 128961310 in words is "one hundred twenty-eight million, nine hundred sixty-one thousand, three hundred ten".