84097987920 has 120 divisors (see below), whose sum is σ = 291539768832. Its totient is φ = 21702700800.

The previous prime is 84097987903. The next prime is 84097987927. The reversal of 84097987920 is 2978979048.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84097987927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1861596 + ... + 1906235.

Almost surely, 2^84097987920 is an apocalyptic number.

84097987920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84097987920 is an abundant number, since it is smaller than the sum of its proper divisors (207441780912).

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

84097987920 is a wasteful number, since it uses less digits than its factorization.

84097987920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767881 (or 3767872 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 84097987920 in words is "eighty-four billion, ninety-seven million, nine hundred eighty-seven thousand, nine hundred twenty".