39028640 has 48 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 13380864.

The previous prime is 39028601. The next prime is 39028643. The reversal of 39028640 is 4682093.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 39028597 and 39028606.

It is not an unprimeable number, because it can be changed into a prime (39028643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16304 + ... + 18543.

It is an arithmetic number, because the mean of its divisors is an integer number (2195424).

Almost surely, 2^39028640 is an apocalyptic number.

It is an amenable number.

39028640 is an abundant number, since it is smaller than the sum of its proper divisors (66351712).

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

39028640 is a wasteful number, since it uses less digits than its factorization.

39028640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34869 (or 34861 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 39028640 is about 6247.2906127377. The cubic root of 39028640 is about 339.2041362080.

The spelling of 39028640 in words is "thirty-nine million, twenty-eight thousand, six hundred forty".