72103306 has 32 divisors (see below), whose sum is σ = 121992768. Its totient is φ = 31674240.

The previous prime is 72103289. The next prime is 72103313. The reversal of 72103306 is 60330127.

It is a super-2 number, since 2×72103306² = 10397773472259272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 in 15 ways as a sum of consecutive naturals, for example, 230206 + ... + 230518.

It is an arithmetic number, because the mean of its divisors is an integer number (3812274).

Almost surely, 2^72103306 is an apocalyptic number.

72103306 is a deficient number, since it is larger than the sum of its proper divisors (49889462).

72103306 is a wasteful number, since it uses less digits than its factorization.

72103306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 72103306 is about 8491.3665566857. The cubic root of 72103306 is about 416.2156372479.

The spelling of 72103306 in words is "seventy-two million, one hundred three thousand, three hundred six".