128417472 has 42 divisors (see below), whose sum is σ = 368087148. Its totient is φ = 42805632.

The previous prime is 128417467. The next prime is 128417501. The reversal of 128417472 is 274714821.

It is a super-2 number, since 2×128417472² = 32982094229741568, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110898 + ... + 112049.

Almost surely, 2^128417472 is an apocalyptic number.

128417472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128417472 is an abundant number, since it is smaller than the sum of its proper divisors (239669676).

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

128417472 is a wasteful number, since it uses less digits than its factorization.

128417472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222965 (or 222952 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 128417472 is about 11332.1433100716. The cubic root of 128417472 is about 504.5157230461.

The spelling of 128417472 in words is "one hundred twenty-eight million, four hundred seventeen thousand, four hundred seventy-two".