72422643 has 8 divisors (see below), whose sum is σ = 97886608. Its totient is φ = 47620224.

The previous prime is 72422641. The next prime is 72422681. The reversal of 72422643 is 34622427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72422643 - 2¹ = 72422641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72422643.

It is not an unprimeable number, because it can be changed into a prime (72422641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165130 + ... + 165567.

It is an arithmetic number, because the mean of its divisors is an integer number (12235826).

Almost surely, 2^72422643 is an apocalyptic number.

72422643 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

72422643 is a deficient number, since it is larger than the sum of its proper divisors (25463965).

72422643 is a wasteful number, since it uses less digits than its factorization.

72422643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330773.

The product of its digits is 16128, while the sum is 30.

The square root of 72422643 is about 8510.1494111443. The cubic root of 72422643 is about 416.8291889372.

The spelling of 72422643 in words is "seventy-two million, four hundred twenty-two thousand, six hundred forty-three".