84724740 has 144 divisors (see below), whose sum is σ = 267478848. Its totient is φ = 21695232.

The previous prime is 84724723. The next prime is 84724751. The reversal of 84724740 is 4742748.

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 = 84724695 and 84724704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 791767 + ... + 791873.

It is an arithmetic number, because the mean of its divisors is an integer number (1857492).

Almost surely, 2^84724740 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 84724740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133739424).

84724740 is an abundant number, since it is smaller than the sum of its proper divisors (182754108).

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

84724740 is a wasteful number, since it uses less digits than its factorization.

84724740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 253 counting only the distinct ones).

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

The square root of 84724740 is about 9204.6042826403. The cubic root of 84724740 is about 439.2078377572.

The spelling of 84724740 in words is "eighty-four million, seven hundred twenty-four thousand, seven hundred forty".