84654780 has 96 divisors (see below), whose sum is σ = 276079104. Its totient is φ = 18979584.

The previous prime is 84654767. The next prime is 84654811. The reversal of 84654780 is 8745648.

84654780 = 428² + 429² + ... + 692².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20359 + ... + 24161.

It is an arithmetic number, because the mean of its divisors is an integer number (2875824).

Almost surely, 2^84654780 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 84654780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138039552).

84654780 is an abundant number, since it is smaller than the sum of its proper divisors (191424324).

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

84654780 is a wasteful number, since it uses less digits than its factorization.

84654780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875 (or 3873 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 84654780 is about 9200.8032258059. The cubic root of 84654780 is about 439.0869150230.

The spelling of 84654780 in words is "eighty-four million, six hundred fifty-four thousand, seven hundred eighty".