64897560 has 288 divisors, whose sum is σ = 265159440. Its totient is φ = 13644288.

The previous prime is 64897543. The next prime is 64897561. The reversal of 64897560 is 6579846.

64897560 is a `hidden beast` number, since 6 + 4 + 89 + 7 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64897561) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 229179 + ... + 229461.

Almost surely, 2^64897560 is an apocalyptic number.

64897560 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 64897560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132579720).

64897560 is an abundant number, since it is smaller than the sum of its proper divisors (200261880).

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

64897560 is a wasteful number, since it uses less digits than its factorization.

64897560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 64897560 is about 8055.9021841132. The cubic root of 64897560 is about 401.8612426731.

The spelling of 64897560 in words is "sixty-four million, eight hundred ninety-seven thousand, five hundred sixty".