28926278 has 4 divisors (see below), whose sum is σ = 43389420. Its totient is φ = 14463138.

The previous prime is 28926263. The next prime is 28926281. The reversal of 28926278 is 87262982.

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

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, 7231568 + ... + 7231571.

It is an arithmetic number, because the mean of its divisors is an integer number (10847355).

Almost surely, 2^28926278 is an apocalyptic number.

28926278 is a deficient number, since it is larger than the sum of its proper divisors (14463142).

28926278 is a wasteful number, since it uses less digits than its factorization.

28926278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14463141.

The product of its digits is 193536, while the sum is 44.

The square root of 28926278 is about 5378.3155355557. The cubic root of 28926278 is about 306.9711198770.

The spelling of 28926278 in words is "twenty-eight million, nine hundred twenty-six thousand, two hundred seventy-eight".