163869420 has 192 divisors, whose sum is σ = 548674560. Its totient is φ = 36019200.

The previous prime is 163869413. The next prime is 163869421. The reversal of 163869420 is 24968361.

163869420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×163869420² = 53706373622272800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (163869421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 609046 + ... + 609314.

It is an arithmetic number, because the mean of its divisors is an integer number (2857680).

Almost surely, 2^163869420 is an apocalyptic number.

163869420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163869420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274337280).

163869420 is an abundant number, since it is smaller than the sum of its proper divisors (384805140).

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

163869420 is a wasteful number, since it uses less digits than its factorization.

163869420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 163869420 is about 12801.1491671646. The cubic root of 163869420 is about 547.2250532500.

The spelling of 163869420 in words is "one hundred sixty-three million, eight hundred sixty-nine thousand, four hundred twenty".