345991396 has 6 divisors (see below), whose sum is σ = 605484950. Its totient is φ = 172995696.

The previous prime is 345991379. The next prime is 345991421. The reversal of 345991396 is 693199543.

It can be written as a sum of positive squares in only one way, i.e., 248692900 + 97298496 = 15770^2 + 9864^2 .

It is a super-2 number, since 2×345991396² = 239420092212057632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43248921 + ... + 43248928.

Almost surely, 2^345991396 is an apocalyptic number.

It is an amenable number.

345991396 is a deficient number, since it is larger than the sum of its proper divisors (259493554).

345991396 is a wasteful number, since it uses less digits than its factorization.

345991396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86497853 (or 86497851 counting only the distinct ones).

The product of its digits is 787320, while the sum is 49.

The square root of 345991396 is about 18600.8439593477. The cubic root of 345991396 is about 702.0290759406.

The spelling of 345991396 in words is "three hundred forty-five million, nine hundred ninety-one thousand, three hundred ninety-six".