340421650 has 24 divisors (see below), whose sum is σ = 645136164. Its totient is φ = 133598400.

The previous prime is 340421629. The next prime is 340421657. The reversal of 340421650 is 56124043.

It can be written as a sum of positive squares in 6 ways, for example, as 90497169 + 249924481 = 9513^2 + 15809^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (340421657) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 61581 + ... + 66880.

Almost surely, 2^340421650 is an apocalyptic number.

340421650 is a deficient number, since it is larger than the sum of its proper divisors (304714514).

340421650 is a wasteful number, since it uses less digits than its factorization.

340421650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128526 (or 128521 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 340421650 is about 18450.5189628910. The cubic root of 340421650 is about 698.2416070413.

Adding to 340421650 its reverse (56124043), we get a palindrome (396545693).

The spelling of 340421650 in words is "three hundred forty million, four hundred twenty-one thousand, six hundred fifty".