38947420 has 12 divisors (see below), whose sum is σ = 81789624. Its totient is φ = 15578960.

The previous prime is 38947411. The next prime is 38947423. The reversal of 38947420 is 2474983.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 38947420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38947423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973666 + ... + 973705.

It is an arithmetic number, because the mean of its divisors is an integer number (6815802).

Almost surely, 2^38947420 is an apocalyptic number.

It is an amenable number.

38947420 is an abundant number, since it is smaller than the sum of its proper divisors (42842204).

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

38947420 is a wasteful number, since it uses less digits than its factorization.

38947420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947380 (or 1947378 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 38947420 is about 6240.7868093695. The cubic root of 38947420 is about 338.9686741386.

The spelling of 38947420 in words is "thirty-eight million, nine hundred forty-seven thousand, four hundred twenty".