64849136 has 40 divisors (see below), whose sum is σ = 137751600. Its totient is φ = 29329920.

The previous prime is 64849097. The next prime is 64849139. The reversal of 64849136 is 63194846.

It is a junction number, because it is equal to n+sod(n) for n = 64849093 and 64849102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64849139) 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, 39500 + ... + 41108.

It is an arithmetic number, because the mean of its divisors is an integer number (3443790).

Almost surely, 2^64849136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64849136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68875800).

64849136 is an abundant number, since it is smaller than the sum of its proper divisors (72902464).

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

64849136 is a wasteful number, since it uses less digits than its factorization.

64849136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1851 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 64849136 is about 8052.8961249975. The cubic root of 64849136 is about 401.7612667991.

The spelling of 64849136 in words is "sixty-four million, eight hundred forty-nine thousand, one hundred thirty-six".