84774240 has 144 divisors (see below), whose sum is σ = 306397728. Its totient is φ = 21270528.

The previous prime is 84774211. The next prime is 84774247. The reversal of 84774240 is 4247748.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 84774195 and 84774204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84774247) by changing a digit.

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, 22749 + ... + 26211.

It is an arithmetic number, because the mean of its divisors is an integer number (2127762).

Almost surely, 2^84774240 is an apocalyptic number.

84774240 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 84774240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153198864).

84774240 is an abundant number, since it is smaller than the sum of its proper divisors (221623488).

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

84774240 is a wasteful number, since it uses less digits than its factorization.

84774240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 84774240 is about 9207.2927617188. The cubic root of 84774240 is about 439.2933560893.

The spelling of 84774240 in words is "eighty-four million, seven hundred seventy-four thousand, two hundred forty".