39649641 has 16 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 25359488.

The previous prime is 39649633. The next prime is 39649657. The reversal of 39649641 is 14694693.

It is a cyclic number.

It is not a de Polignac number, because 39649641 - 2³ = 39649633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39649593 and 39649602.

It is not an unprimeable number, because it can be changed into a prime (39649691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13165 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^39649641 is an apocalyptic number.

It is an amenable number.

39649641 is a deficient number, since it is larger than the sum of its proper divisors (15387159).

39649641 is a wasteful number, since it uses less digits than its factorization.

39649641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928.

The product of its digits is 139968, while the sum is 42.

The square root of 39649641 is about 6296.7960900763. The cubic root of 39649641 is about 340.9937506559.

The spelling of 39649641 in words is "thirty-nine million, six hundred forty-nine thousand, six hundred forty-one".