64399946 has 8 divisors (see below), whose sum is σ = 104030724. Its totient is φ = 29723040.

The previous prime is 64399921. The next prime is 64399963. The reversal of 64399946 is 64999346.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59059225 + 5340721 = 7685^2 + 2311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 64399894 and 64399903.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238435 + ... + 1238486.

Almost surely, 2^64399946 is an apocalyptic number.

64399946 is a deficient number, since it is larger than the sum of its proper divisors (39630778).

64399946 is a wasteful number, since it uses less digits than its factorization.

64399946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476936.

The product of its digits is 1259712, while the sum is 50.

The square root of 64399946 is about 8024.9576945925. The cubic root of 64399946 is about 400.8314911917.

The spelling of 64399946 in words is "sixty-four million, three hundred ninety-nine thousand, nine hundred forty-six".