38147720 has 32 divisors (see below), whose sum is σ = 92436120. Its totient is φ = 14085120.

The previous prime is 38147653. The next prime is 38147729. The reversal of 38147720 is 2774183.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30184036 + 7963684 = 5494^2 + 2822^2 .

It is not an unprimeable number, because it can be changed into a prime (38147729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36161 + ... + 37200.

Almost surely, 2^38147720 is an apocalyptic number.

It is an amenable number.

38147720 is an abundant number, since it is smaller than the sum of its proper divisors (54288400).

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

38147720 is a wasteful number, since it uses less digits than its factorization.

38147720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73385 (or 73381 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 38147720 is about 6176.3840554162. The cubic root of 38147720 is about 336.6326186308.

The spelling of 38147720 in words is "thirty-eight million, one hundred forty-seven thousand, seven hundred twenty".