38947788 has 72 divisors (see below), whose sum is σ = 109287360. Its totient is φ = 11595360.

The previous prime is 38947787. The next prime is 38947789. The reversal of 38947788 is 88774983.

It is an interprime number because it is at equal distance from previous prime (38947787) and next prime (38947789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38947787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22531 + ... + 24197.

It is an arithmetic number, because the mean of its divisors is an integer number (1517880).

Almost surely, 2^38947788 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 38947788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54643680).

38947788 is an abundant number, since it is smaller than the sum of its proper divisors (70339572).

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

38947788 is a wasteful number, since it uses less digits than its factorization.

38947788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1742 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 38947788 is about 6240.8162927617. The cubic root of 38947788 is about 338.9697417324.

The spelling of 38947788 in words is "thirty-eight million, nine hundred forty-seven thousand, seven hundred eighty-eight".