422078387 has 4 divisors (see below), whose sum is σ = 422249520. Its totient is φ = 421907256.

The previous prime is 422078381. The next prime is 422078399. The reversal of 422078387 is 783870224.

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

It is a cyclic number.

It is not a de Polignac number, because 422078387 - 2⁸ = 422078131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422078381) 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, 81812 + ... + 86817.

It is an arithmetic number, because the mean of its divisors is an integer number (105562380).

Almost surely, 2^422078387 is an apocalyptic number.

422078387 is a deficient number, since it is larger than the sum of its proper divisors (171133).

422078387 is a wasteful number, since it uses less digits than its factorization.

422078387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171132.

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

The square root of 422078387 is about 20544.5464053116. The cubic root of 422078387 is about 750.1205062662.

The spelling of 422078387 in words is "four hundred twenty-two million, seventy-eight thousand, three hundred eighty-seven".