7278349578 has 32 divisors (see below), whose sum is σ = 14634305856. Its totient is φ = 2413202688.

The previous prime is 7278349537. The next prime is 7278349583. The reversal of 7278349578 is 8759438727.

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, 2195250 + ... + 2198562.

It is an arithmetic number, because the mean of its divisors is an integer number (457322058).

Almost surely, 2^7278349578 is an apocalyptic number.

7278349578 is an abundant number, since it is smaller than the sum of its proper divisors (7355956278).

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

7278349578 is a wasteful number, since it uses less digits than its factorization.

7278349578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158.

The product of its digits is 23708160, while the sum is 60.

The square root of 7278349578 is about 85313.2438604933. The cubic root of 7278349578 is about 1937.9577454601.

The spelling of 7278349578 in words is "seven billion, two hundred seventy-eight million, three hundred forty-nine thousand, five hundred seventy-eight".