64838742 has 8 divisors (see below), whose sum is σ = 129677496. Its totient is φ = 21612912.

The previous prime is 64838729. The next prime is 64838749. The reversal of 64838742 is 24783846.

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

64838742 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 64838694 and 64838703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64838749) 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, 5403223 + ... + 5403234.

It is an arithmetic number, because the mean of its divisors is an integer number (16209687).

Almost surely, 2^64838742 is an apocalyptic number.

64838742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64838742 is a wasteful number, since it uses less digits than its factorization.

64838742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806462.

The product of its digits is 258048, while the sum is 42.

The square root of 64838742 is about 8052.2507412524. The cubic root of 64838742 is about 401.7398009272.

It can be divided in two parts, 6483 and 8742, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 64838742 in words is "sixty-four million, eight hundred thirty-eight thousand, seven hundred forty-two".