64212720 has 160 divisors (see below), whose sum is σ = 233985024. Its totient is φ = 14361600.

The previous prime is 64212713. The next prime is 64212727. The reversal of 64212720 is 2721246.

It is an interprime number because it is at equal distance from previous prime (64212713) and next prime (64212727).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64212727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33385 + ... + 35255.

Almost surely, 2^64212720 is an apocalyptic number.

64212720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64212720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116992512).

64212720 is an abundant number, since it is smaller than the sum of its proper divisors (169772304).

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

64212720 is a wasteful number, since it uses less digits than its factorization.

64212720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 64212720 is about 8013.2839710071. The cubic root of 64212720 is about 400.4426765796.

Adding to 64212720 its reverse (2721246), we get a palindrome (66933966).

The spelling of 64212720 in words is "sixty-four million, two hundred twelve thousand, seven hundred twenty".