8242778 has 8 divisors (see below), whose sum is σ = 12377568. Its totient is φ = 4116924.

The previous prime is 8242777. The next prime is 8242783. The reversal of 8242778 is 8772428.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8 + 2⁹ + 4⁹ + 2²¹ + 7⁶ + 7⁸ + 8³ .

It is not an unprimeable number, because it can be changed into a prime (8242777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (1547196).

Almost surely, 2^8242778 is an apocalyptic number.

8242778 is a deficient number, since it is larger than the sum of its proper divisors (4134790).

8242778 is a wasteful number, since it uses less digits than its factorization.

8242778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468.

The product of its digits is 50176, while the sum is 38.

The square root of 8242778 is about 2871.0238591833. The cubic root of 8242778 is about 202.0030225343.

The spelling of 8242778 in words is "eight million, two hundred forty-two thousand, seven hundred seventy-eight".