72403845 has 8 divisors (see below), whose sum is σ = 115846176. Its totient is φ = 38615376.

The previous prime is 72403841. The next prime is 72403861. The reversal of 72403845 is 54830427.

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

It is not a de Polignac number, because 72403845 - 2² = 72403841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72403841) 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, 2413447 + ... + 2413476.

It is an arithmetic number, because the mean of its divisors is an integer number (14480772).

Almost surely, 2^72403845 is an apocalyptic number.

It is an amenable number.

72403845 is a deficient number, since it is larger than the sum of its proper divisors (43442331).

72403845 is a wasteful number, since it uses less digits than its factorization.

72403845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826931.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 72403845 is about 8509.0448935236. The cubic root of 72403845 is about 416.7931217957.

The spelling of 72403845 in words is "seventy-two million, four hundred three thousand, eight hundred forty-five".