28447536 has 40 divisors (see below), whose sum is σ = 79144240. Its totient is φ = 8752896.

The previous prime is 28447493. The next prime is 28447537. The reversal of 28447536 is 63574482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28447494 and 28447503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447537) 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, 22171 + ... + 23418.

It is an arithmetic number, because the mean of its divisors is an integer number (1978606).

Almost surely, 2^28447536 is an apocalyptic number.

28447536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28447536 is an abundant number, since it is smaller than the sum of its proper divisors (50696704).

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

28447536 is a wasteful number, since it uses less digits than its factorization.

28447536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45613 (or 45607 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 28447536 is about 5333.6231587918. The cubic root of 28447536 is about 305.2681901584.

The spelling of 28447536 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred thirty-six".