165370840 has 32 divisors (see below), whose sum is σ = 372450960. Its totient is φ = 66083200.

The previous prime is 165370823. The next prime is 165370841. The reversal of 165370840 is 48073561.

It is a junction number, because it is equal to n+sod(n) for n = 165370796 and 165370805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165370841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76170 + ... + 78310.

Almost surely, 2^165370840 is an apocalyptic number.

165370840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165370840 is an abundant number, since it is smaller than the sum of its proper divisors (207080120).

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

165370840 is a wasteful number, since it uses less digits than its factorization.

165370840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083 (or 4079 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 165370840 is about 12859.6594045099. The cubic root of 165370840 is about 548.8912539821.

The spelling of 165370840 in words is "one hundred sixty-five million, three hundred seventy thousand, eight hundred forty".