84427278 has 32 divisors (see below), whose sum is σ = 182247072. Its totient is φ = 25920000.

The previous prime is 84427261. The next prime is 84427309. The reversal of 84427278 is 87272448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45978 + ... + 47778.

It is an arithmetic number, because the mean of its divisors is an integer number (5695221).

Almost surely, 2^84427278 is an apocalyptic number.

84427278 is an abundant number, since it is smaller than the sum of its proper divisors (97819794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84427278 is a wasteful number, since it uses less digits than its factorization.

84427278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420.

The product of its digits is 200704, while the sum is 42.

The square root of 84427278 is about 9188.4317486718. The cubic root of 84427278 is about 438.6932267998.

It can be divided in two parts, 844272 and 78, that added together give a triangular number (844350 = T₁₂₉₉).

The spelling of 84427278 in words is "eighty-four million, four hundred twenty-seven thousand, two hundred seventy-eight".