72271994 has 8 divisors (see below), whose sum is σ = 110714688. Its totient is φ = 35367100.

The previous prime is 72271993. The next prime is 72272023. The reversal of 72271994 is 49917227.

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

It is a super-2 number, since 2×72271994² = 10446482233472072, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72271993) 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 3 ways as a sum of consecutive naturals, for example, 384332 + ... + 384519.

It is an arithmetic number, because the mean of its divisors is an integer number (13839336).

Almost surely, 2^72271994 is an apocalyptic number.

72271994 is a deficient number, since it is larger than the sum of its proper divisors (38442694).

72271994 is a wasteful number, since it uses less digits than its factorization.

72271994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768900.

The product of its digits is 63504, while the sum is 41.

The square root of 72271994 is about 8501.2936662604. The cubic root of 72271994 is about 416.5399677354.

The spelling of 72271994 in words is "seventy-two million, two hundred seventy-one thousand, nine hundred ninety-four".