28726004 has 12 divisors (see below), whose sum is σ = 50572704. Its totient is φ = 14276664.

The previous prime is 28726001. The next prime is 28726007. The reversal of 28726004 is 40062782.

It is an interprime number because it is at equal distance from previous prime (28726001) and next prime (28726007).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28726001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20834 + ... + 22169.

It is an arithmetic number, because the mean of its divisors is an integer number (4214392).

Almost surely, 2^28726004 is an apocalyptic number.

It is an amenable number.

28726004 is a deficient number, since it is larger than the sum of its proper divisors (21846700).

28726004 is a wasteful number, since it uses less digits than its factorization.

28726004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43174 (or 43172 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28726004 is about 5359.6645417414. The cubic root of 28726004 is about 306.2610300623.

Adding to 28726004 its reverse (40062782), we get a palindrome (68788786).

The spelling of 28726004 in words is "twenty-eight million, seven hundred twenty-six thousand, four".