64461740 has 48 divisors (see below), whose sum is σ = 155350272. Its totient is φ = 22009536.

The previous prime is 64461731. The next prime is 64461743. The reversal of 64461740 is 4716446.

It is a junction number, because it is equal to n+sod(n) for n = 64461697 and 64461706.

It is not an unprimeable number, because it can be changed into a prime (64461743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38807 + ... + 40433.

It is an arithmetic number, because the mean of its divisors is an integer number (3236464).

Almost surely, 2^64461740 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 64461740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77675136).

64461740 is an abundant number, since it is smaller than the sum of its proper divisors (90888532).

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

64461740 is a wasteful number, since it uses less digits than its factorization.

64461740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 64461740 is about 8028.8068852103. The cubic root of 64461740 is about 400.9596541519.

The spelling of 64461740 in words is "sixty-four million, four hundred sixty-one thousand, seven hundred forty".