64278346 has 12 divisors (see below), whose sum is σ = 105979986. Its totient is φ = 29217320.

The previous prime is 64278341. The next prime is 64278397. The reversal of 64278346 is 64387246.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 7502121 = 7535^2 + 2739^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64278299 and 64278308.

It is not an unprimeable number, because it can be changed into a prime (64278341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132565 + ... + 133048.

Almost surely, 2^64278346 is an apocalyptic number.

64278346 is a deficient number, since it is larger than the sum of its proper divisors (41701640).

64278346 is a wasteful number, since it uses less digits than its factorization.

64278346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265637 (or 265626 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 64278346 is about 8017.3777508609. The cubic root of 64278346 is about 400.5790488516.

Subtracting 64278346 from its reverse (64387246), we obtain a square (108900 = 330²).

The spelling of 64278346 in words is "sixty-four million, two hundred seventy-eight thousand, three hundred forty-six".