38904661 has 4 divisors (see below), whose sum is σ = 40596192. Its totient is φ = 37213132.

The previous prime is 38904629. The next prime is 38904667. The reversal of 38904661 is 16640983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38904661 - 2⁵ = 38904629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38904661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38904667) 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, 845731 + ... + 845776.

It is an arithmetic number, because the mean of its divisors is an integer number (10149048).

Almost surely, 2^38904661 is an apocalyptic number.

It is an amenable number.

38904661 is a deficient number, since it is larger than the sum of its proper divisors (1691531).

38904661 is a wasteful number, since it uses less digits than its factorization.

38904661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691530.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 38904661 is about 6237.3600986315. The cubic root of 38904661 is about 338.8445814609.

The spelling of 38904661 in words is "thirty-eight million, nine hundred four thousand, six hundred sixty-one".