631616340 has 96 divisors (see below), whose sum is σ = 1852139520. Its totient is φ = 160521856.

The previous prime is 631616309. The next prime is 631616341. The reversal of 631616340 is 43616136.

631616340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 631616298 and 631616307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631616341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478201 + ... + 479519.

It is an arithmetic number, because the mean of its divisors is an integer number (19293120).

Almost surely, 2^631616340 is an apocalyptic number.

631616340 is a gapful number since it is divisible by the number (60) 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 631616340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926069760).

631616340 is an abundant number, since it is smaller than the sum of its proper divisors (1220523180).

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

631616340 is a wasteful number, since it uses less digits than its factorization.

631616340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1699 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 631616340 is about 25131.9784338599. The cubic root of 631616340 is about 857.9943979508.

The spelling of 631616340 in words is "six hundred thirty-one million, six hundred sixteen thousand, three hundred forty".