345198690 has 48 divisors (see below), whose sum is σ = 899124408. Its totient is φ = 91888128.

The previous prime is 345198683. The next prime is 345198701. The reversal of 345198690 is 96891543.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 269977761 + 75220929 = 16431^2 + 8673^2 .

It is a super-2 number, since 2×345198690² = 238324271155432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52042 + ... + 58298.

Almost surely, 2^345198690 is an apocalyptic number.

345198690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345198690 is an abundant number, since it is smaller than the sum of its proper divisors (553925718).

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

345198690 is a wasteful number, since it uses less digits than its factorization.

345198690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6883 (or 6880 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 345198690 is about 18579.5234061587. The cubic root of 345198690 is about 701.4925229004.

The spelling of 345198690 in words is "three hundred forty-five million, one hundred ninety-eight thousand, six hundred ninety".