864509394 has 32 divisors (see below), whose sum is σ = 2013310080. Its totient is φ = 242341632.

The previous prime is 864509363. The next prime is 864509407. The reversal of 864509394 is 493905468.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191959 + ... + 196410.

It is an arithmetic number, because the mean of its divisors is an integer number (62915940).

Almost surely, 2^864509394 is an apocalyptic number.

864509394 is an abundant number, since it is smaller than the sum of its proper divisors (1148800686).

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

864509394 is a wasteful number, since it uses less digits than its factorization.

864509394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388434.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 864509394 is about 29402.5406045124. The cubic root of 864509394 is about 952.6277732435.

The spelling of 864509394 in words is "eight hundred sixty-four million, five hundred nine thousand, three hundred ninety-four".