72011810 has 32 divisors (see below), whose sum is σ = 140071680. Its totient is φ = 26497728.

The previous prime is 72011809. The next prime is 72011833. The reversal of 72011810 is 1811027.

It is a super-2 number, since 2×72011810² = 10371401558952200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45899 + ... + 47441.

It is an arithmetic number, because the mean of its divisors is an integer number (4377240).

Almost surely, 2^72011810 is an apocalyptic number.

72011810 is a deficient number, since it is larger than the sum of its proper divisors (68059870).

72011810 is a wasteful number, since it uses less digits than its factorization.

72011810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 72011810 is about 8485.9772566275. The cubic root of 72011810 is about 416.0395094686.

Adding to 72011810 its reverse (1811027), we get a palindrome (73822837).

The spelling of 72011810 in words is "seventy-two million, eleven thousand, eight hundred ten".