40219861 has 8 divisors (see below), whose sum is σ = 44478144. Its totient is φ = 36061920.

The previous prime is 40219853. The next prime is 40219871. The reversal of 40219861 is 16891204.

It is a happy number.

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 40219861 - 2³ = 40219853 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 (40219831) 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, 24241 + ... + 25846.

It is an arithmetic number, because the mean of its divisors is an integer number (5559768).

Almost surely, 2^40219861 is an apocalyptic number.

It is an amenable number.

40219861 is a deficient number, since it is larger than the sum of its proper divisors (4258283).

40219861 is a wasteful number, since it uses less digits than its factorization.

40219861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50171.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 40219861 is about 6341.9130394543. The cubic root of 40219861 is about 342.6206398325.

The spelling of 40219861 in words is "forty million, two hundred nineteen thousand, eight hundred sixty-one".