28457026 has 24 divisors (see below), whose sum is σ = 48077820. Its totient is φ = 12556896.

The previous prime is 28456979. The next prime is 28457047. The reversal of 28457026 is 62075482.

It can be written as a sum of positive squares in 2 ways, for example, as 24453025 + 4004001 = 4945^2 + 2001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28456982 and 28457000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12720 + ... + 14788.

Almost surely, 2^28457026 is an apocalyptic number.

28457026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28457026 is a deficient number, since it is larger than the sum of its proper divisors (19620794).

28457026 is a wasteful number, since it uses less digits than its factorization.

28457026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28457026 is about 5334.5127237640. The cubic root of 28457026 is about 305.3021318566.

The spelling of 28457026 in words is "twenty-eight million, four hundred fifty-seven thousand, twenty-six".