64885740 has 24 divisors (see below), whose sum is σ = 181680240. Its totient is φ = 17302848.

The previous prime is 64885721. The next prime is 64885747. The reversal of 64885740 is 4758846.

It is a junction number, because it is equal to n+sod(n) for n = 64885692 and 64885701.

It is not an unprimeable number, because it can be changed into a prime (64885747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540655 + ... + 540774.

It is an arithmetic number, because the mean of its divisors is an integer number (7570010).

Almost surely, 2^64885740 is an apocalyptic number.

64885740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64885740 is an abundant number, since it is smaller than the sum of its proper divisors (116794500).

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

64885740 is a wasteful number, since it uses less digits than its factorization.

64885740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081441 (or 1081439 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 64885740 is about 8055.1685271011. The cubic root of 64885740 is about 401.8368437676.

The spelling of 64885740 in words is "sixty-four million, eight hundred eighty-five thousand, seven hundred forty".