82727778 has 96 divisors (see below), whose sum is σ = 206184960. Its totient is φ = 22014720.

The previous prime is 82727759. The next prime is 82727789. The reversal of 82727778 is 87772728.

Its product of digits (614656) is a multiple of the sum of its prime factors (392).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 264150 + ... + 264462.

It is an arithmetic number, because the mean of its divisors is an integer number (2147760).

Almost surely, 2^82727778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82727778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103092480).

82727778 is an abundant number, since it is smaller than the sum of its proper divisors (123457182).

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

82727778 is a wasteful number, since it uses less digits than its factorization.

82727778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 385 counting only the distinct ones).

The product of its digits is 614656, while the sum is 48.

The square root of 82727778 is about 9095.4811857317. The cubic root of 82727778 is about 435.7296566364.

The spelling of 82727778 in words is "eighty-two million, seven hundred twenty-seven thousand, seven hundred seventy-eight".