28383490 has 16 divisors (see below), whose sum is σ = 51175800. Its totient is φ = 11334400.

The previous prime is 28383469. The next prime is 28383497. The reversal of 28383490 is 9438382.

It can be written as a sum of positive squares in 4 ways, for example, as 24176889 + 4206601 = 4917^2 + 2051^2 .

It is not an unprimeable number, because it can be changed into a prime (28383497) 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, 4986 + ... + 9034.

Almost surely, 2^28383490 is an apocalyptic number.

28383490 is a deficient number, since it is larger than the sum of its proper divisors (22792310).

28383490 is a wasteful number, since it uses less digits than its factorization.

28383490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 28383490 is about 5327.6157894503. The cubic root of 28383490 is about 305.0389272182.

It can be divided in two parts, 2838 and 3490, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 28383490 in words is "twenty-eight million, three hundred eighty-three thousand, four hundred ninety".