64461438 has 12 divisors (see below), whose sum is σ = 139666488. Its totient is φ = 21487140.

The previous prime is 64461413. The next prime is 64461451. The reversal of 64461438 is 83416446.

64461438 is a `hidden beast` number, since 6 + 4 + 4 + 614 + 38 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1790578 + ... + 1790613.

It is an arithmetic number, because the mean of its divisors is an integer number (11638874).

Almost surely, 2^64461438 is an apocalyptic number.

64461438 is an abundant number, since it is smaller than the sum of its proper divisors (75205050).

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

64461438 is a wasteful number, since it uses less digits than its factorization.

64461438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581199 (or 3581196 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 64461438 is about 8028.7880779106. The cubic root of 64461438 is about 400.9590279923.

The spelling of 64461438 in words is "sixty-four million, four hundred sixty-one thousand, four hundred thirty-eight".