163853840 has 40 divisors (see below), whose sum is σ = 397528128. Its totient is φ = 62691200.

The previous prime is 163853827. The next prime is 163853861. The reversal of 163853840 is 48358361.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 163853794 and 163853803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42686 + ... + 46365.

Almost surely, 2^163853840 is an apocalyptic number.

163853840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163853840 is an abundant number, since it is smaller than the sum of its proper divisors (233674288).

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

163853840 is a wasteful number, since it uses less digits than its factorization.

163853840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89087 (or 89081 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 163853840 is about 12800.5406135835. The cubic root of 163853840 is about 547.2077100985.

The spelling of 163853840 in words is "one hundred sixty-three million, eight hundred fifty-three thousand, eight hundred forty".