28772942 has 32 divisors (see below), whose sum is σ = 50388480. Its totient is φ = 12177280.

The previous prime is 28772927. The next prime is 28772951. The reversal of 28772942 is 24927782.

It is a self number, because there is not a number n which added to its sum of digits gives 28772942.

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 15 ways as a sum of consecutive naturals, for example, 39659 + ... + 40377.

It is an arithmetic number, because the mean of its divisors is an integer number (1574640).

Almost surely, 2^28772942 is an apocalyptic number.

28772942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28772942 is a deficient number, since it is larger than the sum of its proper divisors (21615538).

28772942 is a wasteful number, since it uses less digits than its factorization.

28772942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its digits is 112896, while the sum is 41.

The square root of 28772942 is about 5364.0415732915. The cubic root of 28772942 is about 306.4277484317.

The spelling of 28772942 in words is "twenty-eight million, seven hundred seventy-two thousand, nine hundred forty-two".