42822778 has 8 divisors (see below), whose sum is σ = 65800980. Its totient is φ = 20889120.

The previous prime is 42822761. The next prime is 42822799. The reversal of 42822778 is 87722824.

It can be written as a sum of positive squares in 2 ways, for example, as 41641209 + 1181569 = 6453^2 + 1087^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 42822778.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261033 + ... + 261196.

Almost surely, 2^42822778 is an apocalyptic number.

42822778 is a deficient number, since it is larger than the sum of its proper divisors (22978202).

42822778 is a wasteful number, since it uses less digits than its factorization.

42822778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522272.

The product of its digits is 100352, while the sum is 40.

The square root of 42822778 is about 6543.9115214067. The cubic root of 42822778 is about 349.8578415875.

The spelling of 42822778 in words is "forty-two million, eight hundred twenty-two thousand, seven hundred seventy-eight".