422397780 has 48 divisors (see below), whose sum is σ = 1351674240. Its totient is φ = 96547968.

The previous prime is 422397779. The next prime is 422397791. The reversal of 422397780 is 87793224.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502435 + ... + 503274.

It is an arithmetic number, because the mean of its divisors is an integer number (28159880).

Almost surely, 2^422397780 is an apocalyptic number.

It is an amenable number.

422397780 is an abundant number, since it is smaller than the sum of its proper divisors (929276460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422397780 is a wasteful number, since it uses less digits than its factorization.

422397780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005728 (or 1005726 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 422397780 is about 20552.3181174290. The cubic root of 422397780 is about 750.3096676792.

The spelling of 422397780 in words is "four hundred twenty-two million, three hundred ninety-seven thousand, seven hundred eighty".