28783913 has 8 divisors (see below), whose sum is σ = 29092800. Its totient is φ = 28477008.

The previous prime is 28783883. The next prime is 28783919. The reversal of 28783913 is 31938782.

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

It is a cyclic number.

It is not a de Polignac number, because 28783913 - 2⁶ = 28783849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28783919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65348 + ... + 65786.

It is an arithmetic number, because the mean of its divisors is an integer number (3636600).

Almost surely, 2^28783913 is an apocalyptic number.

It is an amenable number.

28783913 is a deficient number, since it is larger than the sum of its proper divisors (308887).

28783913 is a wasteful number, since it uses less digits than its factorization.

28783913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 72576, while the sum is 41.

The square root of 28783913 is about 5365.0641189086. The cubic root of 28783913 is about 306.4666900136.

The spelling of 28783913 in words is "twenty-eight million, seven hundred eighty-three thousand, nine hundred thirteen".