84899840 has 48 divisors (see below), whose sum is σ = 203734440. Its totient is φ = 33955840.

The previous prime is 84899839. The next prime is 84899851. The reversal of 84899840 is 4899848.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6095 + ... + 14385.

Almost surely, 2^84899840 is an apocalyptic number.

84899840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84899840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101867220).

84899840 is an abundant number, since it is smaller than the sum of its proper divisors (118834600).

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

84899840 is an equidigital number, since it uses as much as digits as its factorization.

84899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8318 (or 8298 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 84899840 is about 9214.1109175004. The cubic root of 84899840 is about 439.5101987648.

The spelling of 84899840 in words is "eighty-four million, eight hundred ninety-nine thousand, eight hundred forty".