28138676 has 6 divisors (see below), whose sum is σ = 49242690. Its totient is φ = 14069336.

The previous prime is 28138667. The next prime is 28138679. The reversal of 28138676 is 67683182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 302500 = 5276^2 + 550^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28138679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3517331 + ... + 3517338.

It is an arithmetic number, because the mean of its divisors is an integer number (8207115).

Almost surely, 2^28138676 is an apocalyptic number.

It is an amenable number.

28138676 is a deficient number, since it is larger than the sum of its proper divisors (21104014).

28138676 is a wasteful number, since it uses less digits than its factorization.

28138676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034673 (or 7034671 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 28138676 is about 5304.5900878390. The cubic root of 28138676 is about 304.1593837584.

The spelling of 28138676 in words is "twenty-eight million, one hundred thirty-eight thousand, six hundred seventy-six".