28774955 has 32 divisors (see below), whose sum is σ = 40296960. Its totient is φ = 19551840.

The previous prime is 28774943. The next prime is 28774969. The reversal of 28774955 is 55947782.

It is a happy number.

It is not a de Polignac number, because 28774955 - 2¹⁶ = 28709419 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669164 + ... + 669206.

It is an arithmetic number, because the mean of its divisors is an integer number (1259280).

Almost surely, 2^28774955 is an apocalyptic number.

28774955 is a deficient number, since it is larger than the sum of its proper divisors (11522005).

28774955 is an equidigital number, since it uses as much as digits as its factorization.

28774955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 82 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 28774955 is about 5364.2292083765. The cubic root of 28774955 is about 306.4348943198.

The spelling of 28774955 in words is "twenty-eight million, seven hundred seventy-four thousand, nine hundred fifty-five".