39479440 has 320 divisors, whose sum is σ = 134991360. Its totient is φ = 10321920.

The previous prime is 39479417. The next prime is 39479441. The reversal of 39479440 is 4497493.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 39479393 and 39479402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39479441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1361346 + ... + 1361374.

It is an arithmetic number, because the mean of its divisors is an integer number (421848).

Almost surely, 2^39479440 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 39479440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67495680).

39479440 is an abundant number, since it is smaller than the sum of its proper divisors (95511920).

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

39479440 is a wasteful number, since it uses less digits than its factorization.

39479440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 39479440 is about 6283.2666663130. The cubic root of 39479440 is about 340.5051315170.

The spelling of 39479440 in words is "thirty-nine million, four hundred seventy-nine thousand, four hundred forty".