28370736 has 60 divisors (see below), whose sum is σ = 82350632. Its totient is φ = 9455616.

The previous prime is 28370711. The next prime is 28370737. The reversal of 28370736 is 63707382.

It is a super-2 number, since 2×28370736² = 1609797322363392, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28370736.

It is not an unprimeable number, because it can be changed into a prime (28370737) 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, 240 + ... + 7536.

Almost surely, 2^28370736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28370736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41175316).

28370736 is an abundant number, since it is smaller than the sum of its proper divisors (53979896).

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

28370736 is an equidigital number, since it uses as much as digits as its factorization.

28370736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7320 (or 7302 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 28370736 is about 5326.4186842568. The cubic root of 28370736 is about 304.9932310600.

It can be divided in two parts, 2 and 8370736, that added together give a palindrome (8370738).

The spelling of 28370736 in words is "twenty-eight million, three hundred seventy thousand, seven hundred thirty-six".