64161288 has 64 divisors (see below), whose sum is σ = 179592000. Its totient is φ = 21223296.

The previous prime is 64161263. The next prime is 64161299. The reversal of 64161288 is 88216146.

64161288 is a `hidden beast` number, since 641 + 6 + 1 + 2 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28956 + ... + 31092.

It is an arithmetic number, because the mean of its divisors is an integer number (2806125).

Almost surely, 2^64161288 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 64161288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89796000).

64161288 is an abundant number, since it is smaller than the sum of its proper divisors (115430712).

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

64161288 is a wasteful number, since it uses less digits than its factorization.

64161288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291 (or 2281 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 64161288 is about 8010.0741569601. The cubic root of 64161288 is about 400.3357347932.

The spelling of 64161288 in words is "sixty-four million, one hundred sixty-one thousand, two hundred eighty-eight".