28291752 has 48 divisors (see below), whose sum is σ = 76883040. Its totient is φ = 9398688.

The previous prime is 28291751. The next prime is 28291759. The reversal of 28291752 is 25719282.

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 (28291751) 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, 31453 + ... + 32339.

It is an arithmetic number, because the mean of its divisors is an integer number (1601730).

Almost surely, 2^28291752 is an apocalyptic number.

It is an amenable number.

28291752 is an abundant number, since it is smaller than the sum of its proper divisors (48591288).

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

28291752 is a wasteful number, since it uses less digits than its factorization.

28291752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1335 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28291752 is about 5318.9991539762. Note that the first 3 decimals coincide. The cubic root of 28291752 is about 304.7099347425.

The spelling of 28291752 in words is "twenty-eight million, two hundred ninety-one thousand, seven hundred fifty-two".