39928434 has 96 divisors (see below), whose sum is σ = 103574016. Its totient is φ = 10160640.

The previous prime is 39928423. The next prime is 39928457. The reversal of 39928434 is 43482993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118314 + ... + 118650.

It is an arithmetic number, because the mean of its divisors is an integer number (1078896).

Almost surely, 2^39928434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39928434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51787008).

39928434 is an abundant number, since it is smaller than the sum of its proper divisors (63645582).

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

39928434 is a wasteful number, since it uses less digits than its factorization.

39928434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 393 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 39928434 is about 6318.8949983363. The cubic root of 39928434 is about 341.7911073448.

The spelling of 39928434 in words is "thirty-nine million, nine hundred twenty-eight thousand, four hundred thirty-four".