84162780 has 192 divisors, whose sum is σ = 297292800. Its totient is φ = 19595520.

The previous prime is 84162779. The next prime is 84162797. The reversal of 84162780 is 8726148.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 63 ways as a sum of consecutive naturals, for example, 133065 + ... + 133695.

It is an arithmetic number, because the mean of its divisors is an integer number (1548400).

Almost surely, 2^84162780 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 84162780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148646400).

84162780 is an abundant number, since it is smaller than the sum of its proper divisors (213130020).

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

84162780 is a wasteful number, since it uses less digits than its factorization.

84162780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 84162780 is about 9174.0274688928. The cubic root of 84162780 is about 438.2346275295.

The spelling of 84162780 in words is "eighty-four million, one hundred sixty-two thousand, seven hundred eighty".