863753440 has 48 divisors (see below), whose sum is σ = 2226132720. Its totient is φ = 314091520.

The previous prime is 863753417. The next prime is 863753461. The reversal of 863753440 is 44357368.

It is a super-2 number, since 2×863753440² = 1492140010223667200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 863753393 and 863753402.

It is a congruent number.

It is an unprimeable number.

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, 243625 + ... + 247144.

It is an arithmetic number, because the mean of its divisors is an integer number (46377765).

Almost surely, 2^863753440 is an apocalyptic number.

863753440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863753440 is an abundant number, since it is smaller than the sum of its proper divisors (1362379280).

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

863753440 is a wasteful number, since it uses less digits than its factorization.

863753440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490795 (or 490787 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 863753440 is about 29389.6825433689. The cubic root of 863753440 is about 952.3500231162.

The spelling of 863753440 in words is "eight hundred sixty-three million, seven hundred fifty-three thousand, four hundred forty".