39561960 has 32 divisors (see below), whose sum is σ = 118686240. Its totient is φ = 10549824.

The previous prime is 39561947. The next prime is 39561967. The reversal of 39561960 is 6916593.

It is not an unprimeable number, because it can be changed into a prime (39561967) 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, 164722 + ... + 164961.

It is an arithmetic number, because the mean of its divisors is an integer number (3708945).

Almost surely, 2^39561960 is an apocalyptic number.

39561960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39561960 is an abundant number, since it is smaller than the sum of its proper divisors (79124280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39561960 is a wasteful number, since it uses less digits than its factorization.

39561960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329697 (or 329693 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 39561960 is about 6289.8298864119. The cubic root of 39561960 is about 340.7422079040.

The spelling of 39561960 in words is "thirty-nine million, five hundred sixty-one thousand, nine hundred sixty".