28090426 has 48 divisors (see below), whose sum is σ = 55933416. Its totient is φ = 10450944.

The previous prime is 28090411. The next prime is 28090457. The reversal of 28090426 is 62409082.

It can be written as a sum of positive squares in 4 ways, for example, as 27931225 + 159201 = 5285^2 + 399^2 .

It is a super-2 number, since 2×28090426² = 1578144065722952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21010 + ... + 22306.

Almost surely, 2^28090426 is an apocalyptic number.

28090426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28090426 is a deficient number, since it is larger than the sum of its proper divisors (27842990).

28090426 is a wasteful number, since it uses less digits than its factorization.

28090426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28090426 is about 5300.0401885269. The cubic root of 28090426 is about 303.9854347246.

The spelling of 28090426 in words is "twenty-eight million, ninety thousand, four hundred twenty-six".