28343278 has 16 divisors (see below), whose sum is σ = 44161920. Its totient is φ = 13632696.

The previous prime is 28343261. The next prime is 28343279. The reversal of 28343278 is 87234382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3303 + ... + 8221.

It is an arithmetic number, because the mean of its divisors is an integer number (2760120).

Almost surely, 2^28343278 is an apocalyptic number.

28343278 is a deficient number, since it is larger than the sum of its proper divisors (15818642).

28343278 is a wasteful number, since it uses less digits than its factorization.

28343278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031.

The product of its digits is 64512, while the sum is 37.

The square root of 28343278 is about 5323.8405310452. The cubic root of 28343278 is about 304.8948056110.

The spelling of 28343278 in words is "twenty-eight million, three hundred forty-three thousand, two hundred seventy-eight".