155871432 has 64 divisors (see below), whose sum is σ = 435336000. Its totient is φ = 51674112.

The previous prime is 155871407. The next prime is 155871439. The reversal of 155871432 is 234178551.

155871432 is a `hidden beast` number, since 1 + 558 + 71 + 4 + 32 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (155871439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39819 + ... + 43557.

It is an arithmetic number, because the mean of its divisors is an integer number (6802125).

Almost surely, 2^155871432 is an apocalyptic number.

155871432 is a gapful number since it is divisible by the number (12) 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 155871432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217668000).

155871432 is an abundant number, since it is smaller than the sum of its proper divisors (279464568).

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

155871432 is a wasteful number, since it uses less digits than its factorization.

155871432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947 (or 3937 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 155871432 is about 12484.8480967932. The cubic root of 155871432 is about 538.1733340504.

The spelling of 155871432 in words is "one hundred fifty-five million, eight hundred seventy-one thousand, four hundred thirty-two".