84031380 has 72 divisors (see below), whose sum is σ = 257336352. Its totient is φ = 22193856.

The previous prime is 84031379. The next prime is 84031429. The reversal of 84031380 is 8313048.

It is a super-2 number, since 2×84031380² = 14122545649408800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17079 + ... + 21441.

It is an arithmetic number, because the mean of its divisors is an integer number (3574116).

Almost surely, 2^84031380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84031380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128668176).

84031380 is an abundant number, since it is smaller than the sum of its proper divisors (173304972).

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

84031380 is a wasteful number, since it uses less digits than its factorization.

84031380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485 (or 4480 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 84031380 is about 9166.8631494094. The cubic root of 84031380 is about 438.0064426400.

The spelling of 84031380 in words is "eighty-four million, thirty-one thousand, three hundred eighty".