7278786812 has 24 divisors (see below), whose sum is σ = 14131393920. Its totient is φ = 3252461360.

The previous prime is 7278786797. The next prime is 7278786833. The reversal of 7278786812 is 2186878727.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399328 + ... + 1404519.

It is an arithmetic number, because the mean of its divisors is an integer number (588808080).

Almost surely, 2^7278786812 is an apocalyptic number.

It is an amenable number.

7278786812 is a deficient number, since it is larger than the sum of its proper divisors (6852607108).

7278786812 is a wasteful number, since it uses less digits than its factorization.

7278786812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803921 (or 2803919 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 56.

The square root of 7278786812 is about 85315.8063432562. The cubic root of 7278786812 is about 1937.9965511463.

The spelling of 7278786812 in words is "seven billion, two hundred seventy-eight million, seven hundred eighty-six thousand, eight hundred twelve".