28624894 has 8 divisors (see below), whose sum is σ = 43380288. Its totient is φ = 14164800.

The previous prime is 28624877. The next prime is 28624901. The reversal of 28624894 is 49842682.

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

It is a super-2 number, since 2×28624894² = 1638769113022472, 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 28624894.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73582 + ... + 73969.

It is an arithmetic number, because the mean of its divisors is an integer number (5422536).

Almost surely, 2^28624894 is an apocalyptic number.

28624894 is a deficient number, since it is larger than the sum of its proper divisors (14755394).

28624894 is a wasteful number, since it uses less digits than its factorization.

28624894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147650.

The product of its digits is 221184, while the sum is 43.

The square root of 28624894 is about 5350.2237336396. The cubic root of 28624894 is about 305.9012810410.

The spelling of 28624894 in words is "twenty-eight million, six hundred twenty-four thousand, eight hundred ninety-four".