64277740 has 12 divisors (see below), whose sum is σ = 134983296. Its totient is φ = 25711088.

The previous prime is 64277737. The next prime is 64277749. The reversal of 64277740 is 4777246.

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 64277740.

It is not an unprimeable number, because it can be changed into a prime (64277749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606924 + ... + 1606963.

It is an arithmetic number, because the mean of its divisors is an integer number (11248608).

Almost surely, 2^64277740 is an apocalyptic number.

It is an amenable number.

64277740 is an abundant number, since it is smaller than the sum of its proper divisors (70705556).

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

64277740 is a wasteful number, since it uses less digits than its factorization.

64277740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213896 (or 3213894 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 64277740 is about 8017.3399578663. The cubic root of 64277740 is about 400.5777899949.

The spelling of 64277740 in words is "sixty-four million, two hundred seventy-seven thousand, seven hundred forty".