7240471785 has 96 divisors (see below), whose sum is σ = 13545960480. Its totient is φ = 3564601344.

The previous prime is 7240471769. The next prime is 7240471813. The reversal of 7240471785 is 5871740427.

7240471785 is a `hidden beast` number, since 72 + 40 + 471 + 78 + 5 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 679957776 + 6560514009 = 26076^2 + 80997^2 .

It is not a de Polignac number, because 7240471785 - 2⁴ = 7240471769 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7240471785.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17702661 + ... + 17703069.

It is an arithmetic number, because the mean of its divisors is an integer number (141103755).

Almost surely, 2^7240471785 is an apocalyptic number.

It is an amenable number.

7240471785 is a deficient number, since it is larger than the sum of its proper divisors (6305488695).

7240471785 is a wasteful number, since it uses less digits than its factorization.

7240471785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The square root of 7240471785 is about 85090.9618290920. The cubic root of 7240471785 is about 1934.5900740118.

The spelling of 7240471785 in words is "seven billion, two hundred forty million, four hundred seventy-one thousand, seven hundred eighty-five".