38188820 has 12 divisors (see below), whose sum is σ = 80196564. Its totient is φ = 15275520.

The previous prime is 38188819. The next prime is 38188823. The reversal of 38188820 is 2888183.

It can be written as a sum of positive squares in 2 ways, for example, as 28922884 + 9265936 = 5378^2 + 3044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38188823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954701 + ... + 954740.

It is an arithmetic number, because the mean of its divisors is an integer number (6683047).

Almost surely, 2^38188820 is an apocalyptic number.

It is an amenable number.

38188820 is an abundant number, since it is smaller than the sum of its proper divisors (42007744).

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

38188820 is a wasteful number, since it uses less digits than its factorization.

38188820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909450 (or 1909448 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 38188820 is about 6179.7103491992. The cubic root of 38188820 is about 336.7534701943.

The spelling of 38188820 in words is "thirty-eight million, one hundred eighty-eight thousand, eight hundred twenty".