64853490 has 64 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 15857664.

The previous prime is 64853473. The next prime is 64853497. The reversal of 64853490 is 9435846.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (64853497) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 69346 + ... + 70274.

It is an arithmetic number, because the mean of its divisors is an integer number (2636550).

Almost surely, 2^64853490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64853490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84369600).

64853490 is an abundant number, since it is smaller than the sum of its proper divisors (103885710).

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

64853490 is a wasteful number, since it uses less digits than its factorization.

64853490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 64853490 is about 8053.1664579841. The cubic root of 64853490 is about 401.7702580749.

The spelling of 64853490 in words is "sixty-four million, eight hundred fifty-three thousand, four hundred ninety".