168790420 has 24 divisors (see below), whose sum is σ = 359753184. Its totient is φ = 66507936.

The previous prime is 168790409. The next prime is 168790421. The reversal of 168790420 is 24097861.

It is a self number, because there is not a number n which added to its sum of digits gives 168790420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168790421) 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, 61642 + ... + 64321.

It is an arithmetic number, because the mean of its divisors is an integer number (14989716).

Almost surely, 2^168790420 is an apocalyptic number.

168790420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168790420 is an abundant number, since it is smaller than the sum of its proper divisors (190962764).

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

168790420 is a wasteful number, since it uses less digits than its factorization.

168790420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126039 (or 126037 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 168790420 is about 12991.9367301415. The cubic root of 168790420 is about 552.6488423266.

The spelling of 168790420 in words is "one hundred sixty-eight million, seven hundred ninety thousand, four hundred twenty".