39980729898 has 40 divisors (see below), whose sum is σ = 94301533920. Its totient is φ = 12625492680.

The previous prime is 39980729891. The next prime is 39980729939. The reversal of 39980729898 is 89892708993.

39980729898 is a `hidden beast` number, since 399 + 80 + 72 + 9 + 8 + 98 = 666.

It is not an unprimeable number, because it can be changed into a prime (39980729891) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6491518 + ... + 6497673.

It is an arithmetic number, because the mean of its divisors is an integer number (2357538348).

Almost surely, 2^39980729898 is an apocalyptic number.

39980729898 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

39980729898 is an abundant number, since it is smaller than the sum of its proper divisors (54320804022).

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

39980729898 is a wasteful number, since it uses less digits than its factorization.

39980729898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12989224 (or 12989215 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 39980729898 in words is "thirty-nine billion, nine hundred eighty million, seven hundred twenty-nine thousand, eight hundred ninety-eight".