7278505740 has 108 divisors (see below), whose sum is σ = 24267773712. Its totient is φ = 1764480960.

The previous prime is 7278505711. The next prime is 7278505747. The reversal of 7278505740 is 475058727.

7278505740 is a `hidden beast` number, since 7 + 2 + 78 + 5 + 0 + 574 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (7278505747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145312 + ... + 188871.

Almost surely, 2^7278505740 is an apocalyptic number.

It is an amenable number.

7278505740 is an abundant number, since it is smaller than the sum of its proper divisors (16989267972).

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

7278505740 is a wasteful number, since it uses less digits than its factorization.

7278505740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334220 (or 334204 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 45.

The square root of 7278505740 is about 85314.1590827689. The cubic root of 7278505740 is about 1937.9716054334.

The spelling of 7278505740 in words is "seven billion, two hundred seventy-eight million, five hundred five thousand, seven hundred forty".