38727661 has 16 divisors (see below), whose sum is σ = 45048960. Its totient is φ = 32610240.

The previous prime is 38727631. The next prime is 38727679. The reversal of 38727661 is 16672783.

It is a cyclic number.

It is not a de Polignac number, because 38727661 - 2¹¹ = 38725613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38727631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143835 + ... + 144103.

It is an arithmetic number, because the mean of its divisors is an integer number (2815560).

Almost surely, 2^38727661 is an apocalyptic number.

It is an amenable number.

38727661 is a deficient number, since it is larger than the sum of its proper divisors (6321299).

38727661 is a wasteful number, since it uses less digits than its factorization.

38727661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 84672, while the sum is 40.

The square root of 38727661 is about 6223.1552286601. The cubic root of 38727661 is about 338.3299329632.

The spelling of 38727661 in words is "thirty-eight million, seven hundred twenty-seven thousand, six hundred sixty-one".