40421887 has 8 divisors (see below), whose sum is σ = 44502480. Its totient is φ = 36408960.

The previous prime is 40421867. The next prime is 40421891. The reversal of 40421887 is 78812404.

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 40421887 - 2¹¹ = 40419839 is a prime.

It is a super-3 number, since 3×40421887³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421827) 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, 15658 + ... + 18055.

It is an arithmetic number, because the mean of its divisors is an integer number (5562810).

Almost surely, 2^40421887 is an apocalyptic number.

40421887 is a deficient number, since it is larger than the sum of its proper divisors (4080593).

40421887 is a wasteful number, since it uses less digits than its factorization.

40421887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33833.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 40421887 is about 6357.8209317344. The cubic root of 40421887 is about 343.1933477981.

It can be divided in two parts, 4042 and 1887, that added together give a square (5929 = 77²).

The spelling of 40421887 in words is "forty million, four hundred twenty-one thousand, eight hundred eighty-seven".