28782969 has 8 divisors (see below), whose sum is σ = 38405952. Its totient is φ = 19174320.

The previous prime is 28782961. The next prime is 28782979. The reversal of 28782969 is 96928782.

It is a happy number.

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

It is not a de Polignac number, because 28782969 - 2³ = 28782961 is a prime.

It is a super-2 number, since 2×28782969² = 1656918608909922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28782961) 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, 2659 + ... + 8039.

It is an arithmetic number, because the mean of its divisors is an integer number (4800744).

Almost surely, 2^28782969 is an apocalyptic number.

It is an amenable number.

28782969 is a deficient number, since it is larger than the sum of its proper divisors (9622983).

28782969 is a wasteful number, since it uses less digits than its factorization.

28782969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7167.

The product of its digits is 870912, while the sum is 51.

The square root of 28782969 is about 5364.9761416059. The cubic root of 28782969 is about 306.4633396733.

The spelling of 28782969 in words is "twenty-eight million, seven hundred eighty-two thousand, nine hundred sixty-nine".