3890243260840 has 32 divisors (see below), whose sum is σ = 8797479067080. Its totient is φ = 1548198330112.

The previous prime is 3890243260781. The next prime is 3890243260901. The reversal of 3890243260840 is 480623420983.

It can be written as a sum of positive squares in 4 ways, for example, as 3692984697796 + 197258563044 = 1921714^2 + 444138^2 .

It is a super-2 number, since 2×3890243260840² (a number of 26 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 246834967 + ... + 246850726.

Almost surely, 2^{3890243260840} is an apocalyptic number.

It is an amenable number.

3890243260840 is an abundant number, since it is smaller than the sum of its proper divisors (4907235806240).

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

3890243260840 is a wasteful number, since it uses less digits than its factorization.

3890243260840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493685901 (or 493685897 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 3890243260840 in words is "three trillion, eight hundred ninety billion, two hundred forty-three million, two hundred sixty thousand, eight hundred forty".