72320622 has 32 divisors (see below), whose sum is σ = 158644224. Its totient is φ = 21796800.

The previous prime is 72320621. The next prime is 72320623. The reversal of 72320622 is 22602327.

It is an interprime number because it is at equal distance from previous prime (72320621) and next prime (72320623).

It is a junction number, because it is equal to n+sod(n) for n = 72320592 and 72320601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72320621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9738 + ... + 15474.

It is an arithmetic number, because the mean of its divisors is an integer number (4957632).

Almost surely, 2^72320622 is an apocalyptic number.

72320622 is an abundant number, since it is smaller than the sum of its proper divisors (86323602).

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

72320622 is a wasteful number, since it uses less digits than its factorization.

72320622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 72320622 is about 8504.1532206328. The cubic root of 72320622 is about 416.6333693569.

Adding to 72320622 its reverse (22602327), we get a palindrome (94922949).

The spelling of 72320622 in words is "seventy-two million, three hundred twenty thousand, six hundred twenty-two".