72781214 has 8 divisors (see below), whose sum is σ = 119096568. Its totient is φ = 33082360.

The previous prime is 72781207. The next prime is 72781231. The reversal of 72781214 is 41218727.

It is a happy number.

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

It is a super-2 number, since 2×72781214² = 10594210222627592, which contains 22 as substring.

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

It is a Curzon number.

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, 1654097 + ... + 1654140.

It is an arithmetic number, because the mean of its divisors is an integer number (14887071).

Almost surely, 2^72781214 is an apocalyptic number.

72781214 is a deficient number, since it is larger than the sum of its proper divisors (46315354).

72781214 is a wasteful number, since it uses less digits than its factorization.

72781214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308250.

The product of its digits is 6272, while the sum is 32.

The square root of 72781214 is about 8531.1906554713. The cubic root of 72781214 is about 417.5159762971.

The spelling of 72781214 in words is "seventy-two million, seven hundred eighty-one thousand, two hundred fourteen".