38949561 has 18 divisors (see below), whose sum is σ = 65446602. Its totient is φ = 22256640.

The previous prime is 38949527. The next prime is 38949569. The reversal of 38949561 is 16594983.

It is a happy number.

38949561 is a `hidden beast` number, since 3 + 89 + 4 + 9 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 571536 = 6195^2 + 756^2 .

It is not a de Polignac number, because 38949561 - 2⁶ = 38949497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38949569) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43720 + ... + 44601.

Almost surely, 2^38949561 is an apocalyptic number.

It is an amenable number.

38949561 is a deficient number, since it is larger than the sum of its proper divisors (26497041).

38949561 is a wasteful number, since it uses less digits than its factorization.

38949561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88341 (or 88331 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 38949561 is about 6240.9583398706. The cubic root of 38949561 is about 338.9748852358.

The spelling of 38949561 in words is "thirty-eight million, nine hundred forty-nine thousand, five hundred sixty-one".