840898867920 has 40 divisors (see below), whose sum is σ = 2606786491296. Its totient is φ = 224239698048.

The previous prime is 840898867903. The next prime is 840898867927. The reversal of 840898867920 is 29768898048.

840898867920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×840898867920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840898867927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751872402 + ... + 1751872881.

Almost surely, 2^840898867920 is an apocalyptic number.

840898867920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840898867920 is an abundant number, since it is smaller than the sum of its proper divisors (1765887623376).

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

840898867920 is a wasteful number, since it uses less digits than its factorization.

840898867920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503745299 (or 3503745293 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 69.

The spelling of 840898867920 in words is "eight hundred forty billion, eight hundred ninety-eight million, eight hundred sixty-seven thousand, nine hundred twenty".