39890561 has 8 divisors (see below), whose sum is σ = 40470144. Its totient is φ = 39314880.

The previous prime is 39890537. The next prime is 39890567. The reversal of 39890561 is 16509893.

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

It is a cyclic number.

It is not a de Polignac number, because 39890561 - 2¹⁰ = 39889537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39890567) 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, 24020 + ... + 25626.

It is an arithmetic number, because the mean of its divisors is an integer number (5058768).

Almost surely, 2^39890561 is an apocalyptic number.

It is an amenable number.

39890561 is a deficient number, since it is larger than the sum of its proper divisors (579583).

39890561 is a wasteful number, since it uses less digits than its factorization.

39890561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 39890561 is about 6315.8974817519. The cubic root of 39890561 is about 341.6830076922.

The spelling of 39890561 in words is "thirty-nine million, eight hundred ninety thousand, five hundred sixty-one".