28563694 has 4 divisors (see below), whose sum is σ = 42845544. Its totient is φ = 14281846.

The previous prime is 28563673. The next prime is 28563719. The reversal of 28563694 is 49636582.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28563694² = 1631769229851272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28563694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7140922 + ... + 7140925.

It is an arithmetic number, because the mean of its divisors is an integer number (10711386).

Almost surely, 2^28563694 is an apocalyptic number.

28563694 is a deficient number, since it is larger than the sum of its proper divisors (14281850).

28563694 is a wasteful number, since it uses less digits than its factorization.

28563694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14281849.

The product of its digits is 311040, while the sum is 43.

The square root of 28563694 is about 5344.5012863690. The cubic root of 28563694 is about 305.6831199279.

The spelling of 28563694 in words is "twenty-eight million, five hundred sixty-three thousand, six hundred ninety-four".