40072861 has 8 divisors (see below), whose sum is σ = 41415264. Its totient is φ = 38749200.

The previous prime is 40072853. The next prime is 40072883. The reversal of 40072861 is 16827004.

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 40072861 - 2³ = 40072853 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 (40072841) 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, 271 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (5176908).

Almost surely, 2^40072861 is an apocalyptic number.

It is an amenable number.

40072861 is a deficient number, since it is larger than the sum of its proper divisors (1342403).

40072861 is a wasteful number, since it uses less digits than its factorization.

40072861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40072861 is about 6330.3128674656. The cubic root of 40072861 is about 342.2027143114.

Adding to 40072861 its reverse (16827004), we get a palindrome (56899865).

The spelling of 40072861 in words is "forty million, seventy-two thousand, eight hundred sixty-one".