7893145840 has 40 divisors (see below), whose sum is σ = 18697830048. Its totient is φ = 3097685760.

The previous prime is 7893145829. The next prime is 7893145853. The reversal of 7893145840 is 485413987.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926556 + ... + 935035.

Almost surely, 2^7893145840 is an apocalyptic number.

It is an amenable number.

7893145840 is an abundant number, since it is smaller than the sum of its proper divisors (10804684208).

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

7893145840 is a wasteful number, since it uses less digits than its factorization.

7893145840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861657 (or 1861651 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 7893145840 is about 88843.3781437874. The cubic root of 7893145840 is about 1991.0555446581.

The spelling of 7893145840 in words is "seven billion, eight hundred ninety-three million, one hundred forty-five thousand, eight hundred forty".