28778914 has 8 divisors (see below), whose sum is σ = 43193808. Its totient is φ = 14380980.

The previous prime is 28778891. The next prime is 28778941. The reversal of 28778914 is 41987782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629 + ... + 7759.

It is an arithmetic number, because the mean of its divisors is an integer number (5399226).

Almost surely, 2^28778914 is an apocalyptic number.

28778914 is a deficient number, since it is larger than the sum of its proper divisors (14414894).

28778914 is a wasteful number, since it uses less digits than its factorization.

28778914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480.

The product of its digits is 225792, while the sum is 46.

The square root of 28778914 is about 5364.5982142188. The cubic root of 28778914 is about 306.4489472826.

It can be divided in two parts, 28778 and 914, that added together give a palindrome (29692).

The spelling of 28778914 in words is "twenty-eight million, seven hundred seventy-eight thousand, nine hundred fourteen".