165863740 has 24 divisors (see below), whose sum is σ = 398073312. Its totient is φ = 56867520.

The previous prime is 165863729. The next prime is 165863759. The reversal of 165863740 is 47368561.

It is a happy number.

165863740 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 165863693 and 165863702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592231 + ... + 592510.

It is an arithmetic number, because the mean of its divisors is an integer number (16586388).

Almost surely, 2^165863740 is an apocalyptic number.

165863740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165863740 is an abundant number, since it is smaller than the sum of its proper divisors (232209572).

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

165863740 is a wasteful number, since it uses less digits than its factorization.

165863740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184757 (or 1184755 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 165863740 is about 12878.8097276107. The cubic root of 165863740 is about 549.4360500431.

The spelling of 165863740 in words is "one hundred sixty-five million, eight hundred sixty-three thousand, seven hundred forty".