28867490 has 16 divisors (see below), whose sum is σ = 52031160. Its totient is φ = 11531520.

The previous prime is 28867477. The next prime is 28867493. The reversal of 28867490 is 9476882.

It can be written as a sum of positive squares in 4 ways, for example, as 21409129 + 7458361 = 4627^2 + 2731^2 .

It is not an unprimeable number, because it can be changed into a prime (28867493) 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, 8660 + ... + 11520.

Almost surely, 2^28867490 is an apocalyptic number.

28867490 is a deficient number, since it is larger than the sum of its proper divisors (23163670).

28867490 is a wasteful number, since it uses less digits than its factorization.

28867490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 28867490 is about 5372.8474759665. The cubic root of 28867490 is about 306.7630223890.

The spelling of 28867490 in words is "twenty-eight million, eight hundred sixty-seven thousand, four hundred ninety".