7860385408 has 16 divisors (see below), whose sum is σ = 15659361810. Its totient is φ = 3930192640.

The previous prime is 7860385391. The next prime is 7860385433. The reversal of 7860385408 is 8045830687.

It can be written as a sum of positive squares in only one way, i.e., 7700413504 + 159971904 = 87752^2 + 12648^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704503 + ... + 30704758.

Almost surely, 2^7860385408 is an apocalyptic number.

It is an amenable number.

7860385408 is a deficient number, since it is larger than the sum of its proper divisors (7798976402).

7860385408 is an equidigital number, since it uses as much as digits as its factorization.

7860385408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61409275 (or 61409263 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 7860385408 is about 88658.8146097160. The cubic root of 7860385408 is about 1988.2971053620.

The spelling of 7860385408 in words is "seven billion, eight hundred sixty million, three hundred eighty-five thousand, four hundred eight".