863920540 has 24 divisors (see below), whose sum is σ = 2073409632. Its totient is φ = 296201280.

The previous prime is 863920529. The next prime is 863920543. The reversal of 863920540 is 45029368.

It is a self number, because there is not a number n which added to its sum of digits gives 863920540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863920543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3085291 + ... + 3085570.

It is an arithmetic number, because the mean of its divisors is an integer number (86392068).

Almost surely, 2^863920540 is an apocalyptic number.

It is an amenable number.

863920540 is an abundant number, since it is smaller than the sum of its proper divisors (1209489092).

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

863920540 is a wasteful number, since it uses less digits than its factorization.

863920540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170877 (or 6170875 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 863920540 is about 29392.5252402715. The cubic root of 863920540 is about 952.4114323951.

It can be divided in two parts, 863 and 920540, that added together give a triangular number (921403 = T₁₃₅₇).

The spelling of 863920540 in words is "eight hundred sixty-three million, nine hundred twenty thousand, five hundred forty".