28064642 has 8 divisors (see below), whose sum is σ = 42120000. Its totient is φ = 14024644.

The previous prime is 28064639. The next prime is 28064651. The reversal of 28064642 is 24646082.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28064599 and 28064608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3659 + ... + 8337.

It is an arithmetic number, because the mean of its divisors is an integer number (5265000).

Almost surely, 2^28064642 is an apocalyptic number.

28064642 is a deficient number, since it is larger than the sum of its proper divisors (14055358).

28064642 is a wasteful number, since it uses less digits than its factorization.

28064642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 28064642 is about 5297.6071957064. The cubic root of 28064642 is about 303.8923975713.

The spelling of 28064642 in words is "twenty-eight million, sixty-four thousand, six hundred forty-two".