39956224 has 72 divisors (see below), whose sum is σ = 99485568. Its totient is φ = 15559680.

The previous prime is 39956219. The next prime is 39956227. The reversal of 39956224 is 42265993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39956227) 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, 18699 + ... + 20725.

It is an arithmetic number, because the mean of its divisors is an integer number (1381744).

Almost surely, 2^39956224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39956224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49742784).

39956224 is an abundant number, since it is smaller than the sum of its proper divisors (59529344).

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

39956224 is a wasteful number, since it uses less digits than its factorization.

39956224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2047 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 39956224 is about 6321.0935762730. The cubic root of 39956224 is about 341.8703839502.

The spelling of 39956224 in words is "thirty-nine million, nine hundred fifty-six thousand, two hundred twenty-four".