39620028 has 72 divisors (see below), whose sum is σ = 110111232. Its totient is φ = 11049696.

The previous prime is 39620027. The next prime is 39620057. The reversal of 39620028 is 82002693.

It is a junction number, because it is equal to n+sod(n) for n = 39619977 and 39620004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39620023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24501 + ... + 26067.

Almost surely, 2^39620028 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 39620028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55055616).

39620028 is an abundant number, since it is smaller than the sum of its proper divisors (70491204).

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

39620028 is a wasteful number, since it uses less digits than its factorization.

39620028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 39620028 is about 6294.4442169265. Note that the first 3 decimals coincide. The cubic root of 39620028 is about 340.9088372103.

The spelling of 39620028 in words is "thirty-nine million, six hundred twenty thousand, twenty-eight".