28490236 has 6 divisors (see below), whose sum is σ = 49857920. Its totient is φ = 14245116.

The previous prime is 28490207. The next prime is 28490239. The reversal of 28490236 is 63209482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3561276 + ... + 3561283.

Almost surely, 2^28490236 is an apocalyptic number.

It is an amenable number.

28490236 is a deficient number, since it is larger than the sum of its proper divisors (21367684).

28490236 is a wasteful number, since it uses less digits than its factorization.

28490236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122563 (or 7122561 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28490236 is about 5337.6245652912. The cubic root of 28490236 is about 305.4208505422.

The spelling of 28490236 in words is "twenty-eight million, four hundred ninety thousand, two hundred thirty-six".