84978459384 has 64 divisors (see below), whose sum is σ = 261472189440. Its totient is φ = 22411900800.

The previous prime is 84978459373. The next prime is 84978459407. The reversal of 84978459384 is 48395487948.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19452592 + ... + 19456959.

It is an arithmetic number, because the mean of its divisors is an integer number (4085502960).

Almost surely, 2^84978459384 is an apocalyptic number.

84978459384 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

84978459384 is an abundant number, since it is smaller than the sum of its proper divisors (176493730056).

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

84978459384 is a wasteful number, since it uses less digits than its factorization.

84978459384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38909580 (or 38909576 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 69.

The spelling of 84978459384 in words is "eighty-four billion, nine hundred seventy-eight million, four hundred fifty-nine thousand, three hundred eighty-four".