38561691 has 8 divisors (see below), whose sum is σ = 58760704. Its totient is φ = 22035240.

The previous prime is 38561683. The next prime is 38561701. The reversal of 38561691 is 19616583.

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

It is not a de Polignac number, because 38561691 - 2³ = 38561683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38561641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918115 + ... + 918156.

It is an arithmetic number, because the mean of its divisors is an integer number (7345088).

Almost surely, 2^38561691 is an apocalyptic number.

38561691 is a deficient number, since it is larger than the sum of its proper divisors (20199013).

38561691 is a wasteful number, since it uses less digits than its factorization.

38561691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836281.

The product of its digits is 38880, while the sum is 39.

The square root of 38561691 is about 6209.8060356182. The cubic root of 38561691 is about 337.8459289866.

The spelling of 38561691 in words is "thirty-eight million, five hundred sixty-one thousand, six hundred ninety-one".