72261806 has 16 divisors (see below), whose sum is σ = 112129920. Its totient is φ = 34890240.

The previous prime is 72261797. The next prime is 72261841. The reversal of 72261806 is 60816227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37310 + ... + 39198.

It is an arithmetic number, because the mean of its divisors is an integer number (7008120).

Almost surely, 2^72261806 is an apocalyptic number.

72261806 is a deficient number, since it is larger than the sum of its proper divisors (39868114).

72261806 is a wasteful number, since it uses less digits than its factorization.

72261806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 72261806 is about 8500.6944422206. The cubic root of 72261806 is about 416.5203939541.

The spelling of 72261806 in words is "seventy-two million, two hundred sixty-one thousand, eight hundred six".