38669664 has 72 divisors (see below), whose sum is σ = 111608280. Its totient is φ = 11714560.

The previous prime is 38669663. The next prime is 38669671. The reversal of 38669664 is 46696683.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38669663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9952 + ... + 13280.

It is an arithmetic number, because the mean of its divisors is an integer number (1550115).

Almost surely, 2^38669664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38669664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55804140).

38669664 is an abundant number, since it is smaller than the sum of its proper divisors (72938616).

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

38669664 is a wasteful number, since it uses less digits than its factorization.

38669664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364 (or 3345 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 38669664 is about 6218.4937082866. The cubic root of 38669664 is about 338.1609587823.

It can be divided in two parts, 386696 and 64, that added together give a triangular number (386760 = T₈₇₉).

The spelling of 38669664 in words is "thirty-eight million, six hundred sixty-nine thousand, six hundred sixty-four".