40213887 has 8 divisors (see below), whose sum is σ = 61278336. Its totient is φ = 22979352.

The previous prime is 40213879. The next prime is 40213889. The reversal of 40213887 is 78831204.

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

It is not a de Polignac number, because 40213887 - 2³ = 40213879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957453 + ... + 957494.

It is an arithmetic number, because the mean of its divisors is an integer number (7659792).

Almost surely, 2^40213887 is an apocalyptic number.

40213887 is a deficient number, since it is larger than the sum of its proper divisors (21064449).

40213887 is a wasteful number, since it uses less digits than its factorization.

40213887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914957.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 40213887 is about 6341.4420284349. The cubic root of 40213887 is about 342.6036754356.

The spelling of 40213887 in words is "forty million, two hundred thirteen thousand, eight hundred eighty-seven".