840197450 has 12 divisors (see below), whose sum is σ = 1562767350. Its totient is φ = 336078960.

The previous prime is 840197447. The next prime is 840197453. The reversal of 840197450 is 54791048.

It is an interprime number because it is at equal distance from previous prime (840197447) and next prime (840197453).

It can be written as a sum of positive squares in 3 ways, for example, as 672727969 + 167469481 = 25937^2 + 12941^2 .

It is not an unprimeable number, because it can be changed into a prime (840197453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8401925 + ... + 8402024.

Almost surely, 2^840197450 is an apocalyptic number.

840197450 is a deficient number, since it is larger than the sum of its proper divisors (722569900).

840197450 is a wasteful number, since it uses less digits than its factorization.

840197450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16803961 (or 16803956 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 840197450 is about 28986.1596283468. The cubic root of 840197450 is about 943.6127195315.

The spelling of 840197450 in words is "eight hundred forty million, one hundred ninety-seven thousand, four hundred fifty".