72101894 has 8 divisors (see below), whose sum is σ = 109986120. Its totient is φ = 35439856.

The previous prime is 72101857. The next prime is 72101951. The reversal of 72101894 is 49810127.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72101894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305399 + ... + 305634.

It is an arithmetic number, because the mean of its divisors is an integer number (13748265).

Almost surely, 2^72101894 is an apocalyptic number.

72101894 is a deficient number, since it is larger than the sum of its proper divisors (37884226).

72101894 is a wasteful number, since it uses less digits than its factorization.

72101894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611094.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 72101894 is about 8491.2834130065. The cubic root of 72101894 is about 416.2129203113.

The spelling of 72101894 in words is "seventy-two million, one hundred one thousand, eight hundred ninety-four".