28442480 has 40 divisors (see below), whose sum is σ = 72142704. Its totient is φ = 10342400.

The previous prime is 28442443. The next prime is 28442489. The reversal of 28442480 is 8424482.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28442489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15281 + ... + 17040.

Almost surely, 2^28442480 is an apocalyptic number.

28442480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28442480 is an abundant number, since it is smaller than the sum of its proper divisors (43700224).

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

28442480 is a wasteful number, since it uses less digits than its factorization.

28442480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32345 (or 32339 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 28442480 is about 5333.1491634868. The cubic root of 28442480 is about 305.2501039122.

The spelling of 28442480 in words is "twenty-eight million, four hundred forty-two thousand, four hundred eighty".