72226020 has 48 divisors (see below), whose sum is σ = 202664448. Its totient is φ = 19219200.

The previous prime is 72225991. The next prime is 72226027. The reversal of 72226020 is 2062227.

It is not an unprimeable number, because it can be changed into a prime (72226027) 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, 36045 + ... + 37995.

It is an arithmetic number, because the mean of its divisors is an integer number (4222176).

Almost surely, 2^72226020 is an apocalyptic number.

It is an amenable number.

72226020 is an abundant number, since it is smaller than the sum of its proper divisors (130438428).

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

72226020 is a wasteful number, since it uses less digits than its factorization.

72226020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580 (or 2578 counting only the distinct ones).

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

The square root of 72226020 is about 8498.5892947006. The cubic root of 72226020 is about 416.4516252141.

Adding to 72226020 its reverse (2062227), we get a palindrome (74288247).

The spelling of 72226020 in words is "seventy-two million, two hundred twenty-six thousand, twenty".