28774948 has 24 divisors (see below), whose sum is σ = 54624024. Its totient is φ = 13209600.

The previous prime is 28774943. The next prime is 28774969. The reversal of 28774948 is 84947782.

It can be written as a sum of positive squares in 4 ways, for example, as 2334784 + 26440164 = 1528^2 + 5142^2 .

It is not an unprimeable number, because it can be changed into a prime (28774943) 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 7 ways as a sum of consecutive naturals, for example, 2373 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (2276001).

Almost surely, 2^28774948 is an apocalyptic number.

It is an amenable number.

28774948 is a deficient number, since it is larger than the sum of its proper divisors (25849076).

28774948 is a wasteful number, since it uses less digits than its factorization.

28774948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383 (or 10381 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The square root of 28774948 is about 5364.2285559062. The cubic root of 28774948 is about 306.4348694713.

The spelling of 28774948 in words is "twenty-eight million, seven hundred seventy-four thousand, nine hundred forty-eight".