28142426 has 16 divisors (see below), whose sum is σ = 45561768. Its totient is φ = 12960000.

The previous prime is 28142419. The next prime is 28142437. The reversal of 28142426 is 62424182.

It can be written as a sum of positive squares in 4 ways, for example, as 18931201 + 9211225 = 4351^2 + 3035^2 .

It is a super-2 number, since 2×28142426² = 1583992282330952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14726 + ... + 16526.

Almost surely, 2^28142426 is an apocalyptic number.

28142426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28142426 is a deficient number, since it is larger than the sum of its proper divisors (17419342).

28142426 is a wasteful number, since it uses less digits than its factorization.

28142426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417.

The product of its digits is 6144, while the sum is 29.

The square root of 28142426 is about 5304.9435435262. The cubic root of 28142426 is about 304.1728947829.

The spelling of 28142426 in words is "twenty-eight million, one hundred forty-two thousand, four hundred twenty-six".