155123808 has 120 divisors (see below), whose sum is σ = 475744248. Its totient is φ = 44255232.

The previous prime is 155123807. The next prime is 155123819. The reversal of 155123808 is 808321551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155123807) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 230160 + ... + 230832.

Almost surely, 2^155123808 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 155123808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237872124).

155123808 is an abundant number, since it is smaller than the sum of its proper divisors (320620440).

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

155123808 is an frugal number, since it uses more digits than its factorization.

155123808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 155123808 is about 12454.8708544087. The cubic root of 155123808 is about 537.3115205751.

The spelling of 155123808 in words is "one hundred fifty-five million, one hundred twenty-three thousand, eight hundred eight".