28582380 has 36 divisors (see below), whose sum is σ = 86700432. Its totient is φ = 7621920.

The previous prime is 28582339. The next prime is 28582381. The reversal of 28582380 is 8328582.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (28582381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79216 + ... + 79575.

Almost surely, 2^28582380 is an apocalyptic number.

28582380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28582380 is an abundant number, since it is smaller than the sum of its proper divisors (58118052).

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

28582380 is a wasteful number, since it uses less digits than its factorization.

28582380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158806 (or 158801 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28582380 is about 5346.2491524432. The cubic root of 28582380 is about 305.7497633816.

The spelling of 28582380 in words is "twenty-eight million, five hundred eighty-two thousand, three hundred eighty".