861703240 has 32 divisors (see below), whose sum is σ = 1941003000. Its totient is φ = 344295424.

The previous prime is 861703231. The next prime is 861703247. The reversal of 861703240 is 42307168.

It can be written as a sum of positive squares in 4 ways, for example, as 449694436 + 412008804 = 21206^2 + 20298^2 .

It is not an unprimeable number, because it can be changed into a prime (861703247) 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 7 ways as a sum of consecutive naturals, for example, 25566 + ... + 48754.

Almost surely, 2^861703240 is an apocalyptic number.

It is an amenable number.

861703240 is an abundant number, since it is smaller than the sum of its proper divisors (1079299760).

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

861703240 is a wasteful number, since it uses less digits than its factorization.

861703240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24129 (or 24125 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 861703240 is about 29354.7822339053. The cubic root of 861703240 is about 951.5959287232.

The spelling of 861703240 in words is "eight hundred sixty-one million, seven hundred three thousand, two hundred forty".