39720130 has 16 divisors (see below), whose sum is σ = 71568000. Its totient is φ = 15872112.

The previous prime is 39720113. The next prime is 39720137. The reversal of 39720130 is 3102793.

It is a junction number, because it is equal to n+sod(n) for n = 39720095 and 39720104.

It is not an unprimeable number, because it can be changed into a prime (39720137) 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, 18871 + ... + 20869.

It is an arithmetic number, because the mean of its divisors is an integer number (4473000).

Almost surely, 2^39720130 is an apocalyptic number.

39720130 is a deficient number, since it is larger than the sum of its proper divisors (31847870).

39720130 is a wasteful number, since it uses less digits than its factorization.

39720130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 39720130 is about 6302.3908161903. The cubic root of 39720130 is about 341.1957035449.

The spelling of 39720130 in words is "thirty-nine million, seven hundred twenty thousand, one hundred thirty".