65397822 has 16 divisors (see below), whose sum is σ = 149480832. Its totient is φ = 18685080.

The previous prime is 65397811. The next prime is 65397841. The reversal of 65397822 is 22879356.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1557091 = 65397822 / (6 + 5 + 3 + 9 + 7 + 8 + 2 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778504 + ... + 778587.

It is an arithmetic number, because the mean of its divisors is an integer number (9342552).

Almost surely, 2^65397822 is an apocalyptic number.

65397822 is an abundant number, since it is smaller than the sum of its proper divisors (84083010).

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

65397822 is a wasteful number, since it uses less digits than its factorization.

65397822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557103.

The product of its digits is 181440, while the sum is 42.

The square root of 65397822 is about 8086.8919864185. The cubic root of 65397822 is about 402.8911814923.

The spelling of 65397822 in words is "sixty-five million, three hundred ninety-seven thousand, eight hundred twenty-two".