28694644 has 24 divisors (see below), whose sum is σ = 55683936. Its totient is φ = 12828000.

The previous prime is 28694609. The next prime is 28694651. The reversal of 28694644 is 44649682.

It is a self number, because there is not a number n which added to its sum of digits gives 28694644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2662 + ... + 8029.

It is an arithmetic number, because the mean of its divisors is an integer number (2320164).

Almost surely, 2^28694644 is an apocalyptic number.

It is an amenable number.

28694644 is a deficient number, since it is larger than the sum of its proper divisors (26989292).

28694644 is a wasteful number, since it uses less digits than its factorization.

28694644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767 (or 10765 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 28694644 is about 5356.7381866207. The cubic root of 28694644 is about 306.1495417278.

The spelling of 28694644 in words is "twenty-eight million, six hundred ninety-four thousand, six hundred forty-four".