72422394 has 64 divisors (see below), whose sum is σ = 165998592. Its totient is φ = 20865600.

The previous prime is 72422393. The next prime is 72422401. The reversal of 72422394 is 49322427.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (72422393) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 114459 + ... + 115089.

It is an arithmetic number, because the mean of its divisors is an integer number (2593728).

Almost surely, 2^72422394 is an apocalyptic number.

72422394 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 72422394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82999296).

72422394 is an abundant number, since it is smaller than the sum of its proper divisors (93576198).

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

72422394 is a wasteful number, since it uses less digits than its factorization.

72422394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its digits is 24192, while the sum is 33.

The square root of 72422394 is about 8510.1347815414. The cubic root of 72422394 is about 416.8287112294.

Adding to 72422394 its sum of digits (33), we get a palindrome (72422427).

The spelling of 72422394 in words is "seventy-two million, four hundred twenty-two thousand, three hundred ninety-four".