345199940 has 12 divisors (see below), whose sum is σ = 724919916. Its totient is φ = 138079968.

The previous prime is 345199931. The next prime is 345199949. The reversal of 345199940 is 49991543.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (345199931) and next prime (345199949).

It can be written as a sum of positive squares in 2 ways, for example, as 261404224 + 83795716 = 16168^2 + 9154^2 .

It is a junction number, because it is equal to n+sod(n) for n = 345199891 and 345199900.

It is not an unprimeable number, because it can be changed into a prime (345199949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8629979 + ... + 8630018.

It is an arithmetic number, because the mean of its divisors is an integer number (60409993).

Almost surely, 2^345199940 is an apocalyptic number.

It is an amenable number.

345199940 is an abundant number, since it is smaller than the sum of its proper divisors (379719976).

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

345199940 is a wasteful number, since it uses less digits than its factorization.

345199940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17260006 (or 17260004 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 345199940 is about 18579.5570453119. The cubic root of 345199940 is about 701.4933696249.

The spelling of 345199940 in words is "three hundred forty-five million, one hundred ninety-nine thousand, nine hundred forty".