128174940 has 48 divisors (see below), whose sum is σ = 398768160. Its totient is φ = 34179840.

The previous prime is 128174911. The next prime is 128174941. The reversal of 128174940 is 49471821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 128174895 and 128174904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128174941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118141 + ... + 119220.

It is an arithmetic number, because the mean of its divisors is an integer number (8307670).

Almost surely, 2^128174940 is an apocalyptic number.

128174940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128174940 is an abundant number, since it is smaller than the sum of its proper divisors (270593220).

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

128174940 is a wasteful number, since it uses less digits than its factorization.

128174940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237379 (or 237371 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 128174940 is about 11321.4371879192. The cubic root of 128174940 is about 504.1979098033.

The spelling of 128174940 in words is "one hundred twenty-eight million, one hundred seventy-four thousand, nine hundred forty".