834364840 has 16 divisors (see below), whose sum is σ = 1877320980. Its totient is φ = 333745920.

The previous prime is 834364823. The next prime is 834364847. The reversal of 834364840 is 48463438.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 831399556 + 2965284 = 28834^2 + 1722^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 20859121 = 834364840 / (8 + 3 + 4 + 3 + 6 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 834364793 and 834364802.

It is not an unprimeable number, because it can be changed into a prime (834364847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10429521 + ... + 10429600.

Almost surely, 2^834364840 is an apocalyptic number.

It is an amenable number.

834364840 is an abundant number, since it is smaller than the sum of its proper divisors (1042956140).

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

834364840 is a wasteful number, since it uses less digits than its factorization.

834364840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20859132 (or 20859128 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 834364840 is about 28885.3741537132. The cubic root of 834364840 is about 941.4241427632.

The spelling of 834364840 in words is "eight hundred thirty-four million, three hundred sixty-four thousand, eight hundred forty".