864834380 has 24 divisors (see below), whose sum is σ = 1828186080. Its totient is φ = 343641600.

The previous prime is 864834379. The next prime is 864834389. The reversal of 864834380 is 83438468.

It is not an unprimeable number, because it can be changed into a prime (864834389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140165 + ... + 146204.

It is an arithmetic number, because the mean of its divisors is an integer number (76174420).

Almost surely, 2^864834380 is an apocalyptic number.

It is an amenable number.

864834380 is an abundant number, since it is smaller than the sum of its proper divisors (963351700).

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

864834380 is a wasteful number, since it uses less digits than its factorization.

864834380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286529 (or 286527 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 864834380 is about 29408.0665804469. The cubic root of 864834380 is about 952.7471287632.

The spelling of 864834380 in words is "eight hundred sixty-four million, eight hundred thirty-four thousand, three hundred eighty".