40001889 has 8 divisors (see below), whose sum is σ = 53394880. Its totient is φ = 26638416.

The previous prime is 40001861. The next prime is 40001893. The reversal of 40001889 is 98810004.

It is a happy number.

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

It is not a de Polignac number, because 40001889 - 2¹⁶ = 39936353 is a prime.

It is a super-2 number, since 2×40001889² = 3200302247136642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40001789) 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, 3994 + ... + 9795.

It is an arithmetic number, because the mean of its divisors is an integer number (6674360).

Almost surely, 2^40001889 is an apocalyptic number.

It is an amenable number.

40001889 is a deficient number, since it is larger than the sum of its proper divisors (13392991).

40001889 is a wasteful number, since it uses less digits than its factorization.

40001889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14759.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 40001889 is about 6324.7046571362. The cubic root of 40001889 is about 342.0005728249. Note that the first 3 decimals are identical.

The spelling of 40001889 in words is "forty million, one thousand, eight hundred eighty-nine".