85409384 has 32 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 41872512.

The previous prime is 85409381. The next prime is 85409393. The reversal of 85409384 is 48390458.

It is not an unprimeable number, because it can be changed into a prime (85409381) 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, 98537 + ... + 99399.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^85409384 is an apocalyptic number.

It is an amenable number.

85409384 is a deficient number, since it is larger than the sum of its proper divisors (77886616).

85409384 is a wasteful number, since it uses less digits than its factorization.

85409384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 85409384 is about 9241.7197533792. The cubic root of 85409384 is about 440.3877161059.

The spelling of 85409384 in words is "eighty-five million, four hundred nine thousand, three hundred eighty-four".