28007426 has 8 divisors (see below), whose sum is σ = 42803964. Its totient is φ = 13739440.

The previous prime is 28007423. The next prime is 28007431. The reversal of 28007426 is 62470082.

It can be written as a sum of positive squares in 2 ways, for example, as 21631801 + 6375625 = 4651^2 + 2525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28007426² = 1568831822290952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28007423) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 132005 + ... + 132216.

Almost surely, 2^28007426 is an apocalyptic number.

28007426 is a deficient number, since it is larger than the sum of its proper divisors (14796538).

28007426 is a wasteful number, since it uses less digits than its factorization.

28007426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264276.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28007426 is about 5292.2042666549. The cubic root of 28007426 is about 303.6857397072.

The spelling of 28007426 in words is "twenty-eight million, seven thousand, four hundred twenty-six".