351988772 has 24 divisors (see below), whose sum is σ = 639669912. Its totient is φ = 169344000.

The previous prime is 351988771. The next prime is 351988817. The reversal of 351988772 is 277889153.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 349839616 = 1466^2 + 18704^2 .

It is a super-2 number, since 2×351988772² = 247792191228135968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 351988772.

It is not an unprimeable number, because it can be changed into a prime (351988771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2729 + ... + 26672.

It is an arithmetic number, because the mean of its divisors is an integer number (26652913).

Almost surely, 2^351988772 is an apocalyptic number.

It is an amenable number.

351988772 is a deficient number, since it is larger than the sum of its proper divisors (287681140).

351988772 is a wasteful number, since it uses less digits than its factorization.

351988772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29519 (or 29517 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 351988772 is about 18761.3638097021. The cubic root of 351988772 is about 706.0621596462.

The spelling of 351988772 in words is "three hundred fifty-one million, nine hundred eighty-eight thousand, seven hundred seventy-two".