422147678 has 4 divisors (see below), whose sum is σ = 633221520. Its totient is φ = 211073838.

The previous prime is 422147659. The next prime is 422147683. The reversal of 422147678 is 876741224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105536918 + ... + 105536921.

It is an arithmetic number, because the mean of its divisors is an integer number (158305380).

Almost surely, 2^422147678 is an apocalyptic number.

422147678 is a deficient number, since it is larger than the sum of its proper divisors (211073842).

422147678 is a wasteful number, since it uses less digits than its factorization.

422147678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211073841.

The product of its digits is 150528, while the sum is 41.

The square root of 422147678 is about 20546.2326960443. The cubic root of 422147678 is about 750.1615521617.

The spelling of 422147678 in words is "four hundred twenty-two million, one hundred forty-seven thousand, six hundred seventy-eight".