28447590 has 16 divisors (see below), whose sum is σ = 68274288. Its totient is φ = 7586016.

The previous prime is 28447577. The next prime is 28447603. The reversal of 28447590 is 9574482.

It is an interprime number because it is at equal distance from previous prime (28447577) and next prime (28447603).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474097 + ... + 474156.

It is an arithmetic number, because the mean of its divisors is an integer number (4267143).

Almost surely, 2^28447590 is an apocalyptic number.

28447590 is an abundant number, since it is smaller than the sum of its proper divisors (39826698).

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

28447590 is a wasteful number, since it uses less digits than its factorization.

28447590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948263.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28447590 is about 5333.6282210143. The cubic root of 28447590 is about 305.2683833148.

It can be divided in two parts, 284 and 47590, that added together give a palindrome (47874).

The spelling of 28447590 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred ninety".