72620222 has 4 divisors (see below), whose sum is σ = 108930336. Its totient is φ = 36310110.

The previous prime is 72620221. The next prime is 72620227. The reversal of 72620222 is 22202627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22202627 = 37 ⋅600071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72620221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18155054 + ... + 18155057.

It is an arithmetic number, because the mean of its divisors is an integer number (27232584).

Almost surely, 2^72620222 is an apocalyptic number.

72620222 is a deficient number, since it is larger than the sum of its proper divisors (36310114).

72620222 is a wasteful number, since it uses less digits than its factorization.

72620222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36310113.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 72620222 is about 8521.7499376595. The cubic root of 72620222 is about 417.2079006712.

Adding to 72620222 its reverse (22202627), we get a palindrome (94822849).

The spelling of 72620222 in words is "seventy-two million, six hundred twenty thousand, two hundred twenty-two".