28994641 has 8 divisors (see below), whose sum is σ = 32232704. Its totient is φ = 25900560.

The previous prime is 28994621. The next prime is 28994653. The reversal of 28994641 is 14649982.

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 28994641 - 2¹³ = 28986449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28994611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35571 + ... + 36376.

It is an arithmetic number, because the mean of its divisors is an integer number (4029088).

Almost surely, 2^28994641 is an apocalyptic number.

It is an amenable number.

28994641 is a deficient number, since it is larger than the sum of its proper divisors (3238063).

28994641 is a wasteful number, since it uses less digits than its factorization.

28994641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71991.

The product of its digits is 124416, while the sum is 43.

The square root of 28994641 is about 5384.6672134868. The cubic root of 28994641 is about 307.2127566374.

The spelling of 28994641 in words is "twenty-eight million, nine hundred ninety-four thousand, six hundred forty-one".