28662490 has 12 divisors (see below), whose sum is σ = 51622974. Its totient is φ = 11458224.

The previous prime is 28662481. The next prime is 28662509. The reversal of 28662490 is 9426682.

It can be written as a sum of positive squares in 3 ways, for example, as 19954089 + 8708401 = 4467^2 + 2951^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16084 + ... + 17776.

Almost surely, 2^28662490 is an apocalyptic number.

28662490 is a deficient number, since it is larger than the sum of its proper divisors (22960484).

28662490 is an frugal number, since it uses more digits than its factorization.

28662490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393 (or 1700 counting only the distinct ones).

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

The square root of 28662490 is about 5353.7360786651. The cubic root of 28662490 is about 306.0351462614.

It can be divided in two parts, 2866 and 2490, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 28662490 in words is "twenty-eight million, six hundred sixty-two thousand, four hundred ninety".