38994491 has 4 divisors (see below), whose sum is σ = 39127872. Its totient is φ = 38861112.

The previous prime is 38994467. The next prime is 38994503. The reversal of 38994491 is 19449983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38994491 - 2⁶ = 38994427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38994091) 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, 66251 + ... + 66836.

It is an arithmetic number, because the mean of its divisors is an integer number (9781968).

Almost surely, 2^38994491 is an apocalyptic number.

38994491 is a deficient number, since it is larger than the sum of its proper divisors (133381).

38994491 is a wasteful number, since it uses less digits than its factorization.

38994491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133380.

The product of its digits is 279936, while the sum is 47.

The square root of 38994491 is about 6244.5569098215. The cubic root of 38994491 is about 339.1051758710.

The spelling of 38994491 in words is "thirty-eight million, nine hundred ninety-four thousand, four hundred ninety-one".