28449036 has 144 divisors (see below), whose sum is σ = 92951040. Its totient is φ = 7365600.

The previous prime is 28449019. The next prime is 28449059. The reversal of 28449036 is 63094482.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91321 + ... + 91631.

Almost surely, 2^28449036 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 28449036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46475520).

28449036 is an abundant number, since it is smaller than the sum of its proper divisors (64502004).

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

28449036 is a wasteful number, since it uses less digits than its factorization.

28449036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28449036 is about 5333.7637742967. The cubic root of 28449036 is about 305.2735555233.

The spelling of 28449036 in words is "twenty-eight million, four hundred forty-nine thousand, thirty-six".