72301620 has 24 divisors (see below), whose sum is σ = 202444704. Its totient is φ = 19280416.

The previous prime is 72301597. The next prime is 72301633. The reversal of 72301620 is 2610327.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602454 + ... + 602573.

It is an arithmetic number, because the mean of its divisors is an integer number (8435196).

Almost surely, 2^72301620 is an apocalyptic number.

It is an amenable number.

72301620 is an abundant number, since it is smaller than the sum of its proper divisors (130143084).

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

72301620 is a wasteful number, since it uses less digits than its factorization.

72301620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205039 (or 1205037 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 72301620 is about 8503.0359284199. The cubic root of 72301620 is about 416.5968764888.

Adding to 72301620 its reverse (2610327), we get a palindrome (74911947).

The spelling of 72301620 in words is "seventy-two million, three hundred one thousand, six hundred twenty".