72620220 has 48 divisors (see below), whose sum is σ = 206212608. Its totient is φ = 19091520.

The previous prime is 72620201. The next prime is 72620221. The reversal of 72620220 is 2202627.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4264 + ... + 12783.

It is an arithmetic number, because the mean of its divisors is an integer number (4296096).

Almost surely, 2^72620220 is an apocalyptic number.

It is an amenable number.

72620220 is an abundant number, since it is smaller than the sum of its proper divisors (133592388).

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

72620220 is a wasteful number, since it uses less digits than its factorization.

72620220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17130 (or 17128 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 72620220 is about 8521.7498203127. The cubic root of 72620220 is about 417.2078968411.

Adding to 72620220 its reverse (2202627), we get a palindrome (74822847).

The spelling of 72620220 in words is "seventy-two million, six hundred twenty thousand, two hundred twenty".