7854857540 has 12 divisors (see below), whose sum is σ = 16495200876. Its totient is φ = 3141943008.

The previous prime is 7854857459. The next prime is 7854857551. The reversal of 7854857540 is 457584587.

It can be written as a sum of positive squares in 2 ways, for example, as 4886569216 + 2968288324 = 69904^2 + 54482^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 196371419 + ... + 196371458.

It is an arithmetic number, because the mean of its divisors is an integer number (1374600073).

Almost surely, 2^7854857540 is an apocalyptic number.

It is an amenable number.

7854857540 is an abundant number, since it is smaller than the sum of its proper divisors (8640343336).

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

7854857540 is a wasteful number, since it uses less digits than its factorization.

7854857540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392742886 (or 392742884 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 53.

The square root of 7854857540 is about 88627.6341780598. The cubic root of 7854857540 is about 1987.8309016970.

The spelling of 7854857540 in words is "seven billion, eight hundred fifty-four million, eight hundred fifty-seven thousand, five hundred forty".