863452640 has 48 divisors (see below), whose sum is σ = 2043331920. Its totient is φ = 344801280.

The previous prime is 863452633. The next prime is 863452649. The reversal of 863452640 is 46254368.

It is a junction number, because it is equal to n+sod(n) for n = 863452594 and 863452603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863452649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98351 + ... + 106769.

It is an arithmetic number, because the mean of its divisors is an integer number (42569415).

Almost surely, 2^863452640 is an apocalyptic number.

863452640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863452640 is an abundant number, since it is smaller than the sum of its proper divisors (1179879280).

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

863452640 is a wasteful number, since it uses less digits than its factorization.

863452640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075 (or 9067 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 863452640 is about 29384.5646556147. The cubic root of 863452640 is about 952.2394591003.

The spelling of 863452640 in words is "eight hundred sixty-three million, four hundred fifty-two thousand, six hundred forty".