38643388 has 24 divisors (see below), whose sum is σ = 77770112. Its totient is φ = 16457904.

The previous prime is 38643377. The next prime is 38643419. The reversal of 38643388 is 88334683.

It is a super-2 number, since 2×38643388² = 2986622872237088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 8797.

Almost surely, 2^38643388 is an apocalyptic number.

It is an amenable number.

38643388 is an abundant number, since it is smaller than the sum of its proper divisors (39126724).

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

38643388 is a wasteful number, since it uses less digits than its factorization.

38643388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8641 (or 8639 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 38643388 is about 6216.3806189776. The cubic root of 38643388 is about 338.0843480772.

The spelling of 38643388 in words is "thirty-eight million, six hundred forty-three thousand, three hundred eighty-eight".