64091000 has 32 divisors (see below), whose sum is σ = 149975280. Its totient is φ = 25636000.

The previous prime is 64090991. The next prime is 64091017. The reversal of 64091000 is 19046.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31046 + ... + 33045.

Almost surely, 2^64091000 is an apocalyptic number.

It is an amenable number.

64091000 is an abundant number, since it is smaller than the sum of its proper divisors (85884280).

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

64091000 is a wasteful number, since it uses less digits than its factorization.

64091000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64112 (or 64098 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 64091000 is about 8005.6854797075. The cubic root of 64091000 is about 400.1894935496.

The spelling of 64091000 in words is "sixty-four million, ninety-one thousand".