64845740 has 48 divisors (see below), whose sum is σ = 147026880. Its totient is φ = 23950080.

The previous prime is 64845731. The next prime is 64845773. The reversal of 64845740 is 4754846.

It is a super-2 number, since 2×64845740² = 8409939992295200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64845694 and 64845703.

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, 10910 + ... + 15770.

It is an arithmetic number, because the mean of its divisors is an integer number (3063060).

Almost surely, 2^64845740 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 64845740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73513440).

64845740 is an abundant number, since it is smaller than the sum of its proper divisors (82181140).

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

64845740 is a wasteful number, since it uses less digits than its factorization.

64845740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922 (or 4920 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 64845740 is about 8052.6852664189. The cubic root of 64845740 is about 401.7542535724.

The spelling of 64845740 in words is "sixty-four million, eight hundred forty-five thousand, seven hundred forty".