169081920 has 168 divisors, whose sum is σ = 664732224. Its totient is φ = 38642688.

The previous prime is 169081907. The next prime is 169081973. The reversal of 169081920 is 29180961.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15967 + ... + 24353.

Almost surely, 2^169081920 is an apocalyptic number.

169081920 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 169081920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332366112).

169081920 is an abundant number, since it is smaller than the sum of its proper divisors (495650304).

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

169081920 is a wasteful number, since it uses less digits than its factorization.

169081920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417 (or 8404 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 169081920 is about 13003.1503875023. The cubic root of 169081920 is about 552.9667997251.

The spelling of 169081920 in words is "one hundred sixty-nine million, eighty-one thousand, nine hundred twenty".