38868961 has 8 divisors (see below), whose sum is σ = 40470120. Its totient is φ = 37285248.

The previous prime is 38868913. The next prime is 38868971. The reversal of 38868961 is 16986883.

It can be written as a sum of positive squares in 4 ways, for example, as 9492561 + 29376400 = 3081^2 + 5420^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38868961 is a prime.

It is a super-2 number, since 2×38868961² = 3021592258439042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38868901) 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, 285 + ... + 8821.

It is an arithmetic number, because the mean of its divisors is an integer number (5058765).

Almost surely, 2^38868961 is an apocalyptic number.

It is an amenable number.

38868961 is a deficient number, since it is larger than the sum of its proper divisors (1601159).

38868961 is a wasteful number, since it uses less digits than its factorization.

38868961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723.

The product of its digits is 497664, while the sum is 49.

The square root of 38868961 is about 6234.4976541819. The cubic root of 38868961 is about 338.7409053354.

The spelling of 38868961 in words is "thirty-eight million, eight hundred sixty-eight thousand, nine hundred sixty-one".