72229429 has 8 divisors (see below), whose sum is σ = 73577880. Its totient is φ = 70886400.

The previous prime is 72229427. The next prime is 72229457. The reversal of 72229429 is 92492227.

It can be written as a sum of positive squares in 4 ways, for example, as 1703025 + 70526404 = 1305^2 + 8398^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72229429 - 2¹ = 72229427 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 (72229427) 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, 33669 + ... + 35749.

It is an arithmetic number, because the mean of its divisors is an integer number (9197235).

Almost surely, 2^72229429 is an apocalyptic number.

It is an amenable number.

72229429 is a deficient number, since it is larger than the sum of its proper divisors (1348451).

72229429 is a wasteful number, since it uses less digits than its factorization.

72229429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711.

The product of its digits is 36288, while the sum is 37.

The square root of 72229429 is about 8498.7898550323. The cubic root of 72229429 is about 416.4581771523.

The spelling of 72229429 in words is "seventy-two million, two hundred twenty-nine thousand, four hundred twenty-nine".