64836920 has 16 divisors (see below), whose sum is σ = 145883160. Its totient is φ = 25934752.

The previous prime is 64836917. The next prime is 64836943. The reversal of 64836920 is 2963846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810422 + ... + 810501.

Almost surely, 2^64836920 is an apocalyptic number.

It is an amenable number.

64836920 is an abundant number, since it is smaller than the sum of its proper divisors (81046240).

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

64836920 is a wasteful number, since it uses less digits than its factorization.

64836920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620934 (or 1620930 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 64836920 is about 8052.1376043880. The cubic root of 64836920 is about 401.7360378644.

It can be divided in two parts, 64836 and 920, that added together give a palindrome (65756).

The spelling of 64836920 in words is "sixty-four million, eight hundred thirty-six thousand, nine hundred twenty".