345189690 has 24 divisors (see below), whose sum is σ = 897493428. Its totient is φ = 92050560.

The previous prime is 345189679. The next prime is 345189749. The reversal of 345189690 is 96981543.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 315737361 + 29452329 = 17769^2 + 5427^2 .

It is a super-2 number, since 2×345189690² = 238311844164592200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1917631 + ... + 1917810.

Almost surely, 2^345189690 is an apocalyptic number.

345189690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345189690 is an abundant number, since it is smaller than the sum of its proper divisors (552303738).

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

345189690 is a wasteful number, since it uses less digits than its factorization.

345189690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835454 (or 3835451 counting only the distinct ones).

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

The square root of 345189690 is about 18579.2812024578. The cubic root of 345189690 is about 701.4864264234.

The spelling of 345189690 in words is "three hundred forty-five million, one hundred eighty-nine thousand, six hundred ninety".