40298891 has 4 divisors (see below), whose sum is σ = 42669432. Its totient is φ = 37928352.

The previous prime is 40298887. The next prime is 40298897. The reversal of 40298891 is 19889204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40298891 - 2² = 40298887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40298897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185245 + ... + 1185278.

It is an arithmetic number, because the mean of its divisors is an integer number (10667358).

Almost surely, 2^40298891 is an apocalyptic number.

40298891 is a deficient number, since it is larger than the sum of its proper divisors (2370541).

40298891 is a wasteful number, since it uses less digits than its factorization.

40298891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370540.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 40298891 is about 6348.1407514327. The cubic root of 40298891 is about 342.8449037711.

The spelling of 40298891 in words is "forty million, two hundred ninety-eight thousand, eight hundred ninety-one".