72229989 has 8 divisors (see below), whose sum is σ = 103714912. Its totient is φ = 44449200.

The previous prime is 72229979. The next prime is 72229999. The reversal of 72229989 is 98992227.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72229979) and next prime (72229999).

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

It is not a de Polignac number, because 72229989 - 2⁴ = 72229973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72229919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925987 + ... + 926064.

It is an arithmetic number, because the mean of its divisors is an integer number (12964364).

Almost surely, 2^72229989 is an apocalyptic number.

It is an amenable number.

72229989 is a deficient number, since it is larger than the sum of its proper divisors (31484923).

72229989 is a wasteful number, since it uses less digits than its factorization.

72229989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852067.

The product of its digits is 326592, while the sum is 48.

The square root of 72229989 is about 8498.8228008354. The cubic root of 72229989 is about 416.4592534263.

The spelling of 72229989 in words is "seventy-two million, two hundred twenty-nine thousand, nine hundred eighty-nine".