128197020 has 48 divisors (see below), whose sum is σ = 410231808. Its totient is φ = 29302080.

The previous prime is 128197007. The next prime is 128197033. The reversal of 128197020 is 20791821.

It is an interprime number because it is at equal distance from previous prime (128197007) and next prime (128197033).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152196 + ... + 153035.

It is an arithmetic number, because the mean of its divisors is an integer number (8546496).

Almost surely, 2^128197020 is an apocalyptic number.

128197020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128197020 is an abundant number, since it is smaller than the sum of its proper divisors (282034788).

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

128197020 is a wasteful number, since it uses less digits than its factorization.

128197020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305250 (or 305248 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 128197020 is about 11322.4122871409. The cubic root of 128197020 is about 504.2268599518.

The spelling of 128197020 in words is "one hundred twenty-eight million, one hundred ninety-seven thousand, twenty".