31829856240 has 160 divisors (see below), whose sum is σ = 121443227136. Its totient is φ = 6715745280.

The previous prime is 31829856209. The next prime is 31829856263. The reversal of 31829856240 is 4265892813.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31829856240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706866 + ... + 750545.

Almost surely, 2^31829856240 is an apocalyptic number.

31829856240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31829856240 is an abundant number, since it is smaller than the sum of its proper divisors (89613370896).

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

31829856240 is a wasteful number, since it uses less digits than its factorization.

31829856240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457447 (or 1457441 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 31829856240 in words is "thirty-one billion, eight hundred twenty-nine million, eight hundred fifty-six thousand, two hundred forty".