40216949 has 4 divisors (see below), whose sum is σ = 41965536. Its totient is φ = 38468364.

The previous prime is 40216931. The next prime is 40216987. The reversal of 40216949 is 94961204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40216949 - 2²⁰ = 39168373 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 (40216919) 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, 874259 + ... + 874304.

It is an arithmetic number, because the mean of its divisors is an integer number (10491384).

Almost surely, 2^40216949 is an apocalyptic number.

It is an amenable number.

40216949 is a deficient number, since it is larger than the sum of its proper divisors (1748587).

40216949 is a wasteful number, since it uses less digits than its factorization.

40216949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748586.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 40216949 is about 6341.6834515766. The cubic root of 40216949 is about 342.6123708218.

The spelling of 40216949 in words is "forty million, two hundred sixteen thousand, nine hundred forty-nine".