39198861240 has 768 divisors, whose sum is σ = 158854348800. Its totient is φ = 7630156800.

The previous prime is 39198861139. The next prime is 39198861241. The reversal of 39198861240 is 4216889193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39198861241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 205229545 + ... + 205229735.

It is an arithmetic number, because the mean of its divisors is an integer number (206841600).

Almost surely, 2^39198861240 is an apocalyptic number.

39198861240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39198861240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79427174400).

39198861240 is an abundant number, since it is smaller than the sum of its proper divisors (119655487560).

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

39198861240 is a wasteful number, since it uses less digits than its factorization.

39198861240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 39198861240 in words is "thirty-nine billion, one hundred ninety-eight million, eight hundred sixty-one thousand, two hundred forty".