72431022 has 16 divisors (see below), whose sum is σ = 145239120. Its totient is φ = 24080832.

The previous prime is 72430997. The next prime is 72431057. The reversal of 72431022 is 22013427.

It is a self number, because there is not a number n which added to its sum of digits gives 72431022.

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, 13183 + ... + 17850.

It is an arithmetic number, because the mean of its divisors is an integer number (9077445).

Almost surely, 2^72431022 is an apocalyptic number.

72431022 is an abundant number, since it is smaller than the sum of its proper divisors (72808098).

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

72431022 is a wasteful number, since it uses less digits than its factorization.

72431022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31427.

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

The square root of 72431022 is about 8510.6416914355. The cubic root of 72431022 is about 416.8452634545.

Adding to 72431022 its reverse (22013427), we get a palindrome (94444449).

The spelling of 72431022 in words is "seventy-two million, four hundred thirty-one thousand, twenty-two".