28131926 has 4 divisors (see below), whose sum is σ = 42197892. Its totient is φ = 14065962.

The previous prime is 28131907. The next prime is 28131931. The reversal of 28131926 is 62913182.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28131892 and 28131901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7032980 + ... + 7032983.

It is an arithmetic number, because the mean of its divisors is an integer number (10549473).

Almost surely, 2^28131926 is an apocalyptic number.

28131926 is a deficient number, since it is larger than the sum of its proper divisors (14065966).

28131926 is a wasteful number, since it uses less digits than its factorization.

28131926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14065965.

The product of its digits is 5184, while the sum is 32.

The square root of 28131926 is about 5303.9538082453. The cubic root of 28131926 is about 304.1350608890.

The spelling of 28131926 in words is "twenty-eight million, one hundred thirty-one thousand, nine hundred twenty-six".