72081206 has 4 divisors (see below), whose sum is σ = 108121812. Its totient is φ = 36040602.

The previous prime is 72081203. The next prime is 72081253. The reversal of 72081206 is 60218027.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72081203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18020300 + ... + 18020303.

It is an arithmetic number, because the mean of its divisors is an integer number (27030453).

Almost surely, 2^72081206 is an apocalyptic number.

72081206 is a deficient number, since it is larger than the sum of its proper divisors (36040606).

72081206 is a wasteful number, since it uses less digits than its factorization.

72081206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36040605.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72081206 is about 8490.0651352036. The cubic root of 72081206 is about 416.1731088904.

The spelling of 72081206 in words is "seventy-two million, eighty-one thousand, two hundred six".