28891654 has 24 divisors (see below), whose sum is σ = 47918304. Its totient is φ = 13054800.

The previous prime is 28891633. The next prime is 28891669. The reversal of 28891654 is 45619882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28891654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66819 + ... + 67249.

It is an arithmetic number, because the mean of its divisors is an integer number (1996596).

Almost surely, 2^28891654 is an apocalyptic number.

28891654 is a deficient number, since it is larger than the sum of its proper divisors (19026650).

28891654 is a wasteful number, since it uses less digits than its factorization.

28891654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 721 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 28891654 is about 5375.0957200779. The cubic root of 28891654 is about 306.8485921695.

The spelling of 28891654 in words is "twenty-eight million, eight hundred ninety-one thousand, six hundred fifty-four".