128373240 has 32 divisors (see below), whose sum is σ = 385120080. Its totient is φ = 34232832.

The previous prime is 128373221. The next prime is 128373257. The reversal of 128373240 is 42373821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 128373198 and 128373207.

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, 534769 + ... + 535008.

Almost surely, 2^128373240 is an apocalyptic number.

128373240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128373240 is an abundant number, since it is smaller than the sum of its proper divisors (256746840).

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

128373240 is a wasteful number, since it uses less digits than its factorization.

128373240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069791 (or 1069787 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 128373240 is about 11330.1915253009. The cubic root of 128373240 is about 504.4577914117.

The spelling of 128373240 in words is "one hundred twenty-eight million, three hundred seventy-three thousand, two hundred forty".