168779540 has 12 divisors (see below), whose sum is σ = 354437076. Its totient is φ = 67511808.

The previous prime is 168779521. The next prime is 168779551. The reversal of 168779540 is 45977861.

168779540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 126607504 = 6494^2 + 11252^2 .

It is a super-2 number, since 2×168779540² = 56973066245223200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4219469 + ... + 4219508.

It is an arithmetic number, because the mean of its divisors is an integer number (29536423).

Almost surely, 2^168779540 is an apocalyptic number.

168779540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168779540 is an abundant number, since it is smaller than the sum of its proper divisors (185657536).

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

168779540 is a wasteful number, since it uses less digits than its factorization.

168779540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438986 (or 8438984 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 168779540 is about 12991.5180021428. The cubic root of 168779540 is about 552.6369677415.

The spelling of 168779540 in words is "one hundred sixty-eight million, seven hundred seventy-nine thousand, five hundred forty".