64787272 has 96 divisors (see below), whose sum is σ = 147087360. Its totient is φ = 26611200.

The previous prime is 64787263. The next prime is 64787279. The reversal of 64787272 is 27278746.

64787272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64787272² = 8394781226403968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64787279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510073 + ... + 510199.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^64787272 is an apocalyptic number.

64787272 is a gapful number since it is divisible by the number (62) 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 64787272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73543680).

64787272 is an abundant number, since it is smaller than the sum of its proper divisors (82300088).

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

64787272 is a wasteful number, since it uses less digits than its factorization.

64787272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 188 counting only the distinct ones).

The product of its digits is 263424, while the sum is 43.

The square root of 64787272 is about 8049.0541059183. The cubic root of 64787272 is about 401.6334703563.

The spelling of 64787272 in words is "sixty-four million, seven hundred eighty-seven thousand, two hundred seventy-two".