128452240 has 80 divisors (see below), whose sum is σ = 356191488. Its totient is φ = 42121728.

The previous prime is 128452229. The next prime is 128452279. The reversal of 128452240 is 42254821.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×128452240² = 32999955922035200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 128452199 and 128452208.

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, 7894 + ... + 17866.

Almost surely, 2^128452240 is an apocalyptic number.

128452240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128452240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178095744).

128452240 is an abundant number, since it is smaller than the sum of its proper divisors (227739248).

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

128452240 is a wasteful number, since it uses less digits than its factorization.

128452240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10016 (or 10010 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 128452240 is about 11333.6772496838. The cubic root of 128452240 is about 504.5612501320.

The spelling of 128452240 in words is "one hundred twenty-eight million, four hundred fifty-two thousand, two hundred forty".