38218340 has 12 divisors (see below), whose sum is σ = 80258556. Its totient is φ = 15287328.

The previous prime is 38218339. The next prime is 38218361. The reversal of 38218340 is 4381283.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6431296 + 31787044 = 2536^2 + 5638^2 .

It is an unprimeable number.

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, 955439 + ... + 955478.

It is an arithmetic number, because the mean of its divisors is an integer number (6688213).

Almost surely, 2^38218340 is an apocalyptic number.

It is an amenable number.

38218340 is an abundant number, since it is smaller than the sum of its proper divisors (42040216).

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

38218340 is a wasteful number, since it uses less digits than its factorization.

38218340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910926 (or 1910924 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 38218340 is about 6182.0983492662. The cubic root of 38218340 is about 336.8402181141.

The spelling of 38218340 in words is "thirty-eight million, two hundred eighteen thousand, three hundred forty".