873409640 has 32 divisors (see below), whose sum is σ = 1971033480. Its totient is φ = 348321792.

The previous prime is 873409633. The next prime is 873409681. The reversal of 873409640 is 46904378.

It can be written as a sum of positive squares in 4 ways, for example, as 796707076 + 76702564 = 28226^2 + 8758^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18917 + ... + 45876.

Almost surely, 2^873409640 is an apocalyptic number.

It is an amenable number.

873409640 is an abundant number, since it is smaller than the sum of its proper divisors (1097623840).

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

873409640 is a wasteful number, since it uses less digits than its factorization.

873409640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65141 (or 65137 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 873409640 is about 29553.5046991046. The cubic root of 873409640 is about 955.8857639100.

The spelling of 873409640 in words is "eight hundred seventy-three million, four hundred nine thousand, six hundred forty".