28763569 has 8 divisors (see below), whose sum is σ = 29303648. Its totient is φ = 28226880.

The previous prime is 28763551. The next prime is 28763573. The reversal of 28763569 is 96536782.

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 28763569 - 2⁹ = 28763057 is a prime.

It is a super-2 number, since 2×28763569² = 1654685803235522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28764569) 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, 21529 + ... + 22825.

It is an arithmetic number, because the mean of its divisors is an integer number (3662956).

Almost surely, 2^28763569 is an apocalyptic number.

It is an amenable number.

28763569 is a deficient number, since it is larger than the sum of its proper divisors (540079).

28763569 is a wasteful number, since it uses less digits than its factorization.

28763569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695.

The product of its digits is 544320, while the sum is 46.

The square root of 28763569 is about 5363.1678138951. The cubic root of 28763569 is about 306.3944711114.

The spelling of 28763569 in words is "twenty-eight million, seven hundred sixty-three thousand, five hundred sixty-nine".