128602540 has 24 divisors (see below), whose sum is σ = 294617232. Its totient is φ = 46764480.

The previous prime is 128602531. The next prime is 128602553. The reversal of 128602540 is 45206821.

It is a super-2 number, since 2×128602540² = 33077226588903200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128602499 and 128602508.

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, 292059 + ... + 292498.

It is an arithmetic number, because the mean of its divisors is an integer number (12275718).

Almost surely, 2^128602540 is an apocalyptic number.

128602540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128602540 is an abundant number, since it is smaller than the sum of its proper divisors (166014692).

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

128602540 is a wasteful number, since it uses less digits than its factorization.

128602540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584577 (or 584575 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 128602540 is about 11340.3059923443. The cubic root of 128602540 is about 504.7579665591.

It can be divided in two parts, 12860 and 2540, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 128602540 in words is "one hundred twenty-eight million, six hundred two thousand, five hundred forty".