40642849 has 8 divisors (see below), whose sum is σ = 44837352. Its totient is φ = 36600960.

The previous prime is 40642841. The next prime is 40642883. The reversal of 40642849 is 94824604.

It can be written as a sum of positive squares in 4 ways, for example, as 1517824 + 39125025 = 1232^2 + 6255^2 .

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 40642849 - 2³ = 40642841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40642841) 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, 37594 + ... + 38659.

It is an arithmetic number, because the mean of its divisors is an integer number (5604669).

Almost surely, 2^40642849 is an apocalyptic number.

It is an amenable number.

40642849 is a deficient number, since it is larger than the sum of its proper divisors (4194503).

40642849 is a wasteful number, since it uses less digits than its factorization.

40642849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76307.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 40642849 is about 6375.1744289862. The cubic root of 40642849 is about 343.8175552518.

The spelling of 40642849 in words is "forty million, six hundred forty-two thousand, eight hundred forty-nine".