28413288 has 32 divisors (see below), whose sum is σ = 78926400. Its totient is φ = 9471024.

The previous prime is 28413269. The next prime is 28413289. The reversal of 28413288 is 88231482.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28413289) 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, 65556 + ... + 65987.

It is an arithmetic number, because the mean of its divisors is an integer number (2466450).

Almost surely, 2^28413288 is an apocalyptic number.

It is an amenable number.

28413288 is an abundant number, since it is smaller than the sum of its proper divisors (50513112).

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

28413288 is a wasteful number, since it uses less digits than its factorization.

28413288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131558 (or 131548 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 28413288 is about 5330.4116163764. The cubic root of 28413288 is about 305.1456367990.

The spelling of 28413288 in words is "twenty-eight million, four hundred thirteen thousand, two hundred eighty-eight".