622419638 has 4 divisors (see below), whose sum is σ = 933629460. Its totient is φ = 311209818.

The previous prime is 622419619. The next prime is 622419641. The reversal of 622419638 is 836914226.

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

It is a junction number, because it is equal to n+sod(n) for n = 622419595 and 622419604.

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, 155604908 + ... + 155604911.

It is an arithmetic number, because the mean of its divisors is an integer number (233407365).

Almost surely, 2^622419638 is an apocalyptic number.

622419638 is a deficient number, since it is larger than the sum of its proper divisors (311209822).

622419638 is a wasteful number, since it uses less digits than its factorization.

622419638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311209821.

The product of its digits is 124416, while the sum is 41.

The square root of 622419638 is about 24948.3393836143. The cubic root of 622419638 is about 853.8097218250.

The spelling of 622419638 in words is "six hundred twenty-two million, four hundred nineteen thousand, six hundred thirty-eight".