39420765 has 12 divisors (see below), whose sum is σ = 68329404. Its totient is φ = 21024384.

The previous prime is 39420761. The next prime is 39420779. The reversal of 39420765 is 56702493.

39420765 is a `hidden beast` number, since 394 + 207 + 65 = 666.

39420765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18818244 + 20602521 = 4338^2 + 4539^2 .

It is not a de Polignac number, because 39420765 - 2² = 39420761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39420761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437964 + ... + 438053.

It is an arithmetic number, because the mean of its divisors is an integer number (5694117).

Almost surely, 2^39420765 is an apocalyptic number.

It is an amenable number.

39420765 is a deficient number, since it is larger than the sum of its proper divisors (28908639).

39420765 is a wasteful number, since it uses less digits than its factorization.

39420765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876028 (or 876025 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 39420765 is about 6278.5957824979. The cubic root of 39420765 is about 340.3363597500.

The spelling of 39420765 in words is "thirty-nine million, four hundred twenty thousand, seven hundred sixty-five".