38699440 has 80 divisors (see below), whose sum is σ = 97993728. Its totient is φ = 14128128.

The previous prime is 38699413. The next prime is 38699443. The reversal of 38699440 is 4499683.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (38699443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131934 + ... + 132226.

Almost surely, 2^38699440 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 38699440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48996864).

38699440 is an abundant number, since it is smaller than the sum of its proper divisors (59294288).

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

38699440 is a wasteful number, since it uses less digits than its factorization.

38699440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 38699440 is about 6220.8873965054. The cubic root of 38699440 is about 338.2477322058.

The spelling of 38699440 in words is "thirty-eight million, six hundred ninety-nine thousand, four hundred forty".