64263738 has 64 divisors (see below), whose sum is σ = 168698880. Its totient is φ = 15811200.

The previous prime is 64263737. The next prime is 64263743. The reversal of 64263738 is 83736246.

It is a junction number, because it is equal to n+sod(n) for n = 64263696 and 64263705.

It is not an unprimeable number, because it can be changed into a prime (64263737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5118 + ... + 12438.

It is an arithmetic number, because the mean of its divisors is an integer number (2635920).

Almost surely, 2^64263738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64263738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84349440).

64263738 is an abundant number, since it is smaller than the sum of its proper divisors (104435142).

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

64263738 is a wasteful number, since it uses less digits than its factorization.

64263738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363.

The product of its digits is 145152, while the sum is 39.

The square root of 64263738 is about 8016.4666780322. The cubic root of 64263738 is about 400.5487011401.

The spelling of 64263738 in words is "sixty-four million, two hundred sixty-three thousand, seven hundred thirty-eight".