72437645 has 8 divisors (see below), whose sum is σ = 99343104. Its totient is φ = 49671504.

The previous prime is 72437641. The next prime is 72437647. The reversal of 72437645 is 54673427.

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

It is a cyclic number.

It is not a de Polignac number, because 72437645 - 2² = 72437641 is a prime.

It is a super-3 number, since 3×72437645³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72437599 and 72437608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72437641) 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, 1034789 + ... + 1034858.

It is an arithmetic number, because the mean of its divisors is an integer number (12417888).

Almost surely, 2^72437645 is an apocalyptic number.

It is an amenable number.

72437645 is a deficient number, since it is larger than the sum of its proper divisors (26905459).

72437645 is a wasteful number, since it uses less digits than its factorization.

72437645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069659.

The product of its digits is 141120, while the sum is 38.

The square root of 72437645 is about 8511.0307836360. The cubic root of 72437645 is about 416.8579683331.

The spelling of 72437645 in words is "seventy-two million, four hundred thirty-seven thousand, six hundred forty-five".