72208406 has 4 divisors (see below), whose sum is σ = 108312612. Its totient is φ = 36104202.

The previous prime is 72208397. The next prime is 72208427. The reversal of 72208406 is 60480227.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18052100 + ... + 18052103.

It is an arithmetic number, because the mean of its divisors is an integer number (27078153).

Almost surely, 2^72208406 is an apocalyptic number.

72208406 is a deficient number, since it is larger than the sum of its proper divisors (36104206).

72208406 is a wasteful number, since it uses less digits than its factorization.

72208406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36104205.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 72208406 is about 8497.5529418769. The cubic root of 72208406 is about 416.4177686468.

The spelling of 72208406 in words is "seventy-two million, two hundred eight thousand, four hundred six".