39390020 has 24 divisors (see below), whose sum is σ = 87585624. Its totient is φ = 14829056.

The previous prime is 39389989. The next prime is 39390167. The reversal of 39390020 is 2009393.

It can be written as a sum of positive squares in 4 ways, for example, as 5494336 + 33895684 = 2344^2 + 5822^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57587 + ... + 58266.

It is an arithmetic number, because the mean of its divisors is an integer number (3649401).

Almost surely, 2^39390020 is an apocalyptic number.

It is an amenable number.

39390020 is an abundant number, since it is smaller than the sum of its proper divisors (48195604).

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

39390020 is a wasteful number, since it uses less digits than its factorization.

39390020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115879 (or 115877 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 39390020 is about 6276.1469071398. The cubic root of 39390020 is about 340.2478584840.

The spelling of 39390020 in words is "thirty-nine million, three hundred ninety thousand, twenty".