169743420 has 288 divisors, whose sum is σ = 661280256. Its totient is φ = 34214400.

The previous prime is 169743407. The next prime is 169743421. The reversal of 169743420 is 24347961.

169743420 is a `hidden beast` number, since 169 + 74 + 3 + 420 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169743421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 512655 + ... + 512985.

It is an arithmetic number, because the mean of its divisors is an integer number (2296112).

Almost surely, 2^169743420 is an apocalyptic number.

169743420 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 169743420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330640128).

169743420 is an abundant number, since it is smaller than the sum of its proper divisors (491536836).

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

169743420 is a wasteful number, since it uses less digits than its factorization.

169743420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 169743420 is about 13028.5617011242. The cubic root of 169743420 is about 553.6869862241.

The spelling of 169743420 in words is "one hundred sixty-nine million, seven hundred forty-three thousand, four hundred twenty".