72334420 has 12 divisors (see below), whose sum is σ = 151902324. Its totient is φ = 28933760.

The previous prime is 72334411. The next prime is 72334433. The reversal of 72334420 is 2443327.

It can be written as a sum of positive squares in 2 ways, for example, as 50637456 + 21696964 = 7116^2 + 4658^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808341 + ... + 1808380.

It is an arithmetic number, because the mean of its divisors is an integer number (12658527).

Almost surely, 2^72334420 is an apocalyptic number.

It is an amenable number.

72334420 is an abundant number, since it is smaller than the sum of its proper divisors (79567904).

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

72334420 is a wasteful number, since it uses less digits than its factorization.

72334420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616730 (or 3616728 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 72334420 is about 8504.9644326123. The cubic root of 72334420 is about 416.6598640667.

Adding to 72334420 its reverse (2443327), we get a palindrome (74777747).

The spelling of 72334420 in words is "seventy-two million, three hundred thirty-four thousand, four hundred twenty".