155821792 has 48 divisors (see below), whose sum is σ = 352713312. Its totient is φ = 66378240.

The previous prime is 155821789. The next prime is 155821801. The reversal of 155821792 is 297128551.

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, 36742 + ... + 40762.

It is an arithmetic number, because the mean of its divisors is an integer number (7348194).

Almost surely, 2^155821792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155821792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176356656).

155821792 is an abundant number, since it is smaller than the sum of its proper divisors (196891520).

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

155821792 is a wasteful number, since it uses less digits than its factorization.

155821792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4203 counting only the distinct ones).

The product of its digits is 50400, while the sum is 40.

The square root of 155821792 is about 12482.8599287183. The cubic root of 155821792 is about 538.1161977289.

The spelling of 155821792 in words is "one hundred fifty-five million, eight hundred twenty-one thousand, seven hundred ninety-two".