64897750 has 32 divisors (see below), whose sum is σ = 124334496. Its totient is φ = 25351200.

The previous prime is 64897727. The next prime is 64897751. The reversal of 64897750 is 5779846.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64897750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64897751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7732 + ... + 13768.

It is an arithmetic number, because the mean of its divisors is an integer number (3885453).

Almost surely, 2^64897750 is an apocalyptic number.

64897750 is a deficient number, since it is larger than the sum of its proper divisors (59436746).

64897750 is a wasteful number, since it uses less digits than its factorization.

64897750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097 (or 6087 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 64897750 is about 8055.9139767006. The cubic root of 64897750 is about 401.8616348479.

The spelling of 64897750 in words is "sixty-four million, eight hundred ninety-seven thousand, seven hundred fifty".