39855963 has 12 divisors (see below), whose sum is σ = 61817640. Its totient is φ = 22774752.

The previous prime is 39855923. The next prime is 39855967. The reversal of 39855963 is 36955893.

It is not a de Polignac number, because 39855963 - 2²⁰ = 38807387 is a prime.

It is a super-3 number, since 3×39855963³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (39855967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135418 + ... + 135711.

It is an arithmetic number, because the mean of its divisors is an integer number (5151470).

Almost surely, 2^39855963 is an apocalyptic number.

39855963 is a deficient number, since it is larger than the sum of its proper divisors (21961677).

39855963 is a wasteful number, since it uses less digits than its factorization.

39855963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271146 (or 271139 counting only the distinct ones).

The product of its digits is 874800, while the sum is 48.

The square root of 39855963 is about 6313.1579261096. The cubic root of 39855963 is about 341.5841959454.

The spelling of 39855963 in words is "thirty-nine million, eight hundred fifty-five thousand, nine hundred sixty-three".