40049851 has 4 divisors (see below), whose sum is σ = 40065400. Its totient is φ = 40034304.

The previous prime is 40049843. The next prime is 40049857. The reversal of 40049851 is 15894004.

It is a happy number.

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 40049851 - 2³ = 40049843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40049857) 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, 2886 + ... + 9403.

It is an arithmetic number, because the mean of its divisors is an integer number (10016350).

Almost surely, 2^40049851 is an apocalyptic number.

40049851 is a deficient number, since it is larger than the sum of its proper divisors (15549).

40049851 is a wasteful number, since it uses less digits than its factorization.

40049851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15548.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40049851 is about 6328.4951607787. The cubic root of 40049851 is about 342.1372037069.

The spelling of 40049851 in words is "forty million, forty-nine thousand, eight hundred fifty-one".