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345449890 = 2534544989
BaseRepresentation
bin10100100101110…
…010010110100010
3220002000200011101
4110211302112202
51201413344030
654140105014
711363163352
oct2445622642
9802020141
10345449890
11167aa7685
129783516a
1356752126
1433c44b62
15204da7ca
hex149725a2

345449890 has 8 divisors (see below), whose sum is σ = 621809820. Its totient is φ = 138179952.

The previous prime is 345449873. The next prime is 345449899. The reversal of 345449890 is 98944543.

It can be written as a sum of positive squares in 2 ways, for example, as 330185241 + 15264649 = 18171^2 + 3907^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 345449890.

It is not an unprimeable number, because it can be changed into a prime (345449899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17272485 + ... + 17272504.

Almost surely, 2345449890 is an apocalyptic number.

345449890 is a deficient number, since it is larger than the sum of its proper divisors (276359930).

345449890 is a wasteful number, since it uses less digits than its factorization.

345449890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34544996.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 345449890 is about 18586.2823071210. The cubic root of 345449890 is about 701.6626396094.

The spelling of 345449890 in words is "three hundred forty-five million, four hundred forty-nine thousand, eight hundred ninety".

Divisors: 1 2 5 10 34544989 69089978 172724945 345449890