169308990 has 24 divisors (see below), whose sum is σ = 440203608. Its totient is φ = 45149040.

The previous prime is 169308913. The next prime is 169308991. The reversal of 169308990 is 99803961.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169308991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 940516 + ... + 940695.

It is an arithmetic number, because the mean of its divisors is an integer number (18341817).

Almost surely, 2^169308990 is an apocalyptic number.

169308990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169308990 is an abundant number, since it is smaller than the sum of its proper divisors (270894618).

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

169308990 is a wasteful number, since it uses less digits than its factorization.

169308990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881224 (or 1881221 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 169308990 is about 13011.8788036163. The cubic root of 169308990 is about 553.2142261498.

The spelling of 169308990 in words is "one hundred sixty-nine million, three hundred eight thousand, nine hundred ninety".