72243434 has 16 divisors (see below), whose sum is σ = 114454080. Its totient is φ = 34104960.

The previous prime is 72243433. The next prime is 72243461. The reversal of 72243434 is 43434227.

It is a super-2 number, since 2×72243434² = 10438227512224712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72243397 and 72243406.

It is not an unprimeable number, because it can be changed into a prime (72243433) 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 7 ways as a sum of consecutive naturals, for example, 8762 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (7153380).

Almost surely, 2^72243434 is an apocalyptic number.

72243434 is a deficient number, since it is larger than the sum of its proper divisors (42210646).

72243434 is a wasteful number, since it uses less digits than its factorization.

72243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445.

The product of its digits is 16128, while the sum is 29.

The square root of 72243434 is about 8499.6137559303. The cubic root of 72243434 is about 416.4850919428.

The spelling of 72243434 in words is "seventy-two million, two hundred forty-three thousand, four hundred thirty-four".