784674436 has 54 divisors (see below), whose sum is σ = 1729772730. Its totient is φ = 310407552.

The previous prime is 784674433. The next prime is 784674437. The reversal of 784674436 is 634476487.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 74132100 + 710542336 = 8610^2 + 26656^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 784674436.

It is not an unprimeable number, because it can be changed into a prime (784674433) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21280 + ... + 44968.

Almost surely, 2^784674436 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 784674436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864886365).

784674436 is an abundant number, since it is smaller than the sum of its proper divisors (945098294).

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

784674436 is a wasteful number, since it uses less digits than its factorization.

784674436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23733 (or 23711 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 49.

The square root of 784674436 is about 28012.0409110083. The cubic root of 784674436 is about 922.3515911501.

The spelling of 784674436 in words is "seven hundred eighty-four million, six hundred seventy-four thousand, four hundred thirty-six".