42223778 has 8 divisors (see below), whose sum is σ = 63440172. Its totient is φ = 21077056.

The previous prime is 42223759. The next prime is 42223781. The reversal of 42223778 is 87732224.

It can be written as a sum of positive squares in 2 ways, for example, as 42211009 + 12769 = 6497^2 + 113^2 .

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

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, 15875 + ... + 18342.

Almost surely, 2^42223778 is an apocalyptic number.

42223778 is a deficient number, since it is larger than the sum of its proper divisors (21216394).

42223778 is a wasteful number, since it uses less digits than its factorization.

42223778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34836.

The product of its digits is 37632, while the sum is 35.

The square root of 42223778 is about 6497.9826100106. The cubic root of 42223778 is about 348.2189191526.

It can be divided in two parts, 4222 and 3778, that added together give a cube (8000 = 20³).

The spelling of 42223778 in words is "forty-two million, two hundred twenty-three thousand, seven hundred seventy-eight".