72127906 has 16 divisors (see below), whose sum is σ = 116173440. Its totient is φ = 33463360.

The previous prime is 72127883. The next prime is 72127919. The reversal of 72127906 is 60972127.

It is a Harshad number since it is a multiple of its sum of digits (34).

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 7 ways as a sum of consecutive naturals, for example, 12526 + ... + 17353.

It is an arithmetic number, because the mean of its divisors is an integer number (7260840).

Almost surely, 2^72127906 is an apocalyptic number.

72127906 is a deficient number, since it is larger than the sum of its proper divisors (44045534).

72127906 is a wasteful number, since it uses less digits than its factorization.

72127906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29969.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 72127906 is about 8492.8149632498. The cubic root of 72127906 is about 416.2629662865.

The spelling of 72127906 in words is "seventy-two million, one hundred twenty-seven thousand, nine hundred six".