351681630 has 16 divisors (see below), whose sum is σ = 844035984. Its totient is φ = 93781760.

The previous prime is 351681619. The next prime is 351681667. The reversal of 351681630 is 36186153.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 351681591 and 351681600.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5861331 + ... + 5861390.

It is an arithmetic number, because the mean of its divisors is an integer number (52752249).

Almost surely, 2^351681630 is an apocalyptic number.

351681630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

351681630 is an abundant number, since it is smaller than the sum of its proper divisors (492354354).

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

351681630 is a wasteful number, since it uses less digits than its factorization.

351681630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11722731.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 351681630 is about 18753.1765309240. The cubic root of 351681630 is about 705.8567322114.

The spelling of 351681630 in words is "three hundred fifty-one million, six hundred eighty-one thousand, six hundred thirty".