28774425 has 12 divisors (see below), whose sum is σ = 47573840. Its totient is φ = 15346320.

The previous prime is 28774399. The next prime is 28774441. The reversal of 28774425 is 52447782.

It is not a de Polignac number, because 28774425 - 2⁵ = 28774393 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 191755 + ... + 191904.

Almost surely, 2^28774425 is an apocalyptic number.

28774425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28774425 is a deficient number, since it is larger than the sum of its proper divisors (18799415).

28774425 is a wasteful number, since it uses less digits than its factorization.

28774425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383672 (or 383667 counting only the distinct ones).

The product of its digits is 125440, while the sum is 39.

The square root of 28774425 is about 5364.1798068297. The cubic root of 28774425 is about 306.4330129211.

The spelling of 28774425 in words is "twenty-eight million, seven hundred seventy-four thousand, four hundred twenty-five".