40049945 has 8 divisors (see below), whose sum is σ = 51756936. Its totient is φ = 29575296.

The previous prime is 40049939. The next prime is 40049953. The reversal of 40049945 is 54994004.

It can be written as a sum of positive squares in 4 ways, for example, as 259081 + 39790864 = 509^2 + 6308^2 .

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 40049945 - 2¹² = 40045849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308012 + ... + 308141.

It is an arithmetic number, because the mean of its divisors is an integer number (6469617).

Almost surely, 2^40049945 is an apocalyptic number.

It is an amenable number.

40049945 is a deficient number, since it is larger than the sum of its proper divisors (11706991).

40049945 is a wasteful number, since it uses less digits than its factorization.

40049945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616171.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 40049945 is about 6328.5025875005. The cubic root of 40049945 is about 342.1374713805.

The spelling of 40049945 in words is "forty million, forty-nine thousand, nine hundred forty-five".