155806038 has 64 divisors (see below), whose sum is σ = 367992000. Its totient is φ = 48771072.

The previous prime is 155806033. The next prime is 155806039. The reversal of 155806038 is 830608551.

155806038 is a `hidden beast` number, since 15 + 580 + 60 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 155805993 and 155806011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155806033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56598 + ... + 59286.

It is an arithmetic number, because the mean of its divisors is an integer number (5749875).

Almost surely, 2^155806038 is an apocalyptic number.

155806038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155806038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183996000).

155806038 is an abundant number, since it is smaller than the sum of its proper divisors (212185962).

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

155806038 is a wasteful number, since it uses less digits than its factorization.

155806038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 155806038 is about 12482.2288875024. The cubic root of 155806038 is about 538.0980621220.

The spelling of 155806038 in words is "one hundred fifty-five million, eight hundred six thousand, thirty-eight".