40238561 has 8 divisors (see below), whose sum is σ = 46207200. Its totient is φ = 34655040.

The previous prime is 40238557. The next prime is 40238567. The reversal of 40238561 is 16583204.

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 40238561 - 2² = 40238557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40238567) 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, 96056 + ... + 96473.

It is an arithmetic number, because the mean of its divisors is an integer number (5775900).

Almost surely, 2^40238561 is an apocalyptic number.

It is an amenable number.

40238561 is a deficient number, since it is larger than the sum of its proper divisors (5968639).

40238561 is a wasteful number, since it uses less digits than its factorization.

40238561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192559.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 40238561 is about 6343.3871866693. The cubic root of 40238561 is about 342.6737314568.

The spelling of 40238561 in words is "forty million, two hundred thirty-eight thousand, five hundred sixty-one".