163687740 has 24 divisors (see below), whose sum is σ = 458325840. Its totient is φ = 43650048.

The previous prime is 163687723. The next prime is 163687787. The reversal of 163687740 is 47786361.

163687740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 163687692 and 163687701.

It is a congruent number.

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, 1364005 + ... + 1364124.

It is an arithmetic number, because the mean of its divisors is an integer number (19096910).

Almost surely, 2^163687740 is an apocalyptic number.

163687740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163687740 is an abundant number, since it is smaller than the sum of its proper divisors (294638100).

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

163687740 is a wasteful number, since it uses less digits than its factorization.

163687740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728141 (or 2728139 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 163687740 is about 12794.0509612867. The cubic root of 163687740 is about 547.0227445822.

The spelling of 163687740 in words is "one hundred sixty-three million, six hundred eighty-seven thousand, seven hundred forty".