345519890 has 8 divisors (see below), whose sum is σ = 621935820. Its totient is φ = 138207952.

The previous prime is 345519887. The next prime is 345519901. The reversal of 345519890 is 98915543.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 338449609 + 7070281 = 18397^2 + 2659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×345519890² = 238767988771224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17275985 + ... + 17276004.

Almost surely, 2^345519890 is an apocalyptic number.

345519890 is a deficient number, since it is larger than the sum of its proper divisors (276415930).

345519890 is a wasteful number, since it uses less digits than its factorization.

345519890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34551996.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 345519890 is about 18588.1653209778. The cubic root of 345519890 is about 701.7100300501.

The spelling of 345519890 in words is "three hundred forty-five million, five hundred nineteen thousand, eight hundred ninety".