72430906 has 8 divisors (see below), whose sum is σ = 109297440. Its totient is φ = 35998428.

The previous prime is 72430889. The next prime is 72430909. The reversal of 72430906 is 60903427.

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

It is a super-2 number, since 2×72430906² = 10492472287961672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72430909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108096 + ... + 108763.

It is an arithmetic number, because the mean of its divisors is an integer number (13662180).

Almost surely, 2^72430906 is an apocalyptic number.

72430906 is a deficient number, since it is larger than the sum of its proper divisors (36866534).

72430906 is a wasteful number, since it uses less digits than its factorization.

72430906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217028.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 72430906 is about 8510.6348764355. The cubic root of 72430906 is about 416.8450409252.

The spelling of 72430906 in words is "seventy-two million, four hundred thirty thousand, nine hundred six".