351986994 has 24 divisors (see below), whose sum is σ = 783251820. Its totient is φ = 114157728.

The previous prime is 351986983. The next prime is 351987017. The reversal of 351986994 is 499689153.

351986994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 270174969 + 81812025 = 16437^2 + 9045^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 351986994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263589 + ... + 264920.

Almost surely, 2^351986994 is an apocalyptic number.

351986994 is an abundant number, since it is smaller than the sum of its proper divisors (431264826).

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

351986994 is a wasteful number, since it uses less digits than its factorization.

351986994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528554 (or 528551 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 351986994 is about 18761.3164250273. The cubic root of 351986994 is about 706.0609708008.

The spelling of 351986994 in words is "three hundred fifty-one million, nine hundred eighty-six thousand, nine hundred ninety-four".