38549890 has 8 divisors (see below), whose sum is σ = 69389820. Its totient is φ = 15419952.

The previous prime is 38549873. The next prime is 38549899. The reversal of 38549890 is 9894583.

It can be written as a sum of positive squares in 2 ways, for example, as 32364721 + 6185169 = 5689^2 + 2487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 38549890.

It is not an unprimeable number, because it can be changed into a prime (38549899) 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, 1927485 + ... + 1927504.

Almost surely, 2^38549890 is an apocalyptic number.

38549890 is a deficient number, since it is larger than the sum of its proper divisors (30839930).

38549890 is a wasteful number, since it uses less digits than its factorization.

38549890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854996.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 38549890 is about 6208.8557722015. The cubic root of 38549890 is about 337.8114619074.

The spelling of 38549890 in words is "thirty-eight million, five hundred forty-nine thousand, eight hundred ninety".