40740649 has 4 divisors (see below), whose sum is σ = 41038164. Its totient is φ = 40443136.

The previous prime is 40740641. The next prime is 40740671. The reversal of 40740649 is 94604704.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26625600 + 14115049 = 5160^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 40740649 - 2³ = 40740641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40740641) 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, 148552 + ... + 148825.

It is an arithmetic number, because the mean of its divisors is an integer number (10259541).

Almost surely, 2^40740649 is an apocalyptic number.

It is an amenable number.

40740649 is a deficient number, since it is larger than the sum of its proper divisors (297515).

40740649 is a wasteful number, since it uses less digits than its factorization.

40740649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297514.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 40740649 is about 6382.8401985323. The cubic root of 40740649 is about 344.0931135400.

The spelling of 40740649 in words is "forty million, seven hundred forty thousand, six hundred forty-nine".