128650740 has 24 divisors (see below), whose sum is σ = 360222240. Its totient is φ = 34306848.

The previous prime is 128650721. The next prime is 128650759. The reversal of 128650740 is 47056821.

It is an interprime number because it is at equal distance from previous prime (128650721) and next prime (128650759).

It is a congruent number.

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, 1072030 + ... + 1072149.

It is an arithmetic number, because the mean of its divisors is an integer number (15009260).

Almost surely, 2^128650740 is an apocalyptic number.

128650740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128650740 is an abundant number, since it is smaller than the sum of its proper divisors (231571500).

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

128650740 is a wasteful number, since it uses less digits than its factorization.

128650740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144191 (or 2144189 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 128650740 is about 11342.4309563691. The cubic root of 128650740 is about 504.8210194741.

The spelling of 128650740 in words is "one hundred twenty-eight million, six hundred fifty thousand, seven hundred forty".