39969648 has 30 divisors (see below), whose sum is σ = 111859904. Its totient is φ = 13323168.

The previous prime is 39969641. The next prime is 39969689. The reversal of 39969648 is 84696993.

It is a happy number.

It is a super-2 number, since 2×39969648² = 3195145522487808, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 39969594 and 39969603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39969641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138640 + ... + 138927.

Almost surely, 2^39969648 is an apocalyptic number.

It is an amenable number.

39969648 is an abundant number, since it is smaller than the sum of its proper divisors (71890256).

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

39969648 is a wasteful number, since it uses less digits than its factorization.

39969648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277581 (or 277572 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 39969648 is about 6322.1553286834. The cubic root of 39969648 is about 341.9086654637.

The spelling of 39969648 in words is "thirty-nine million, nine hundred sixty-nine thousand, six hundred forty-eight".