7278072820 has 24 divisors (see below), whose sum is σ = 15404304384. Its totient is φ = 2888305056.

The previous prime is 7278072799. The next prime is 7278072871. The reversal of 7278072820 is 282708727.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430152 + ... + 1435231.

It is an arithmetic number, because the mean of its divisors is an integer number (641846016).

Almost surely, 2^7278072820 is an apocalyptic number.

It is an amenable number.

7278072820 is an abundant number, since it is smaller than the sum of its proper divisors (8126231564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7278072820 is a wasteful number, since it uses less digits than its factorization.

7278072820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865519 (or 2865517 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 7278072820 is about 85311.6218343081. The cubic root of 7278072820 is about 1937.9331816446.

The spelling of 7278072820 in words is "seven billion, two hundred seventy-eight million, seventy-two thousand, eight hundred twenty".