155308920 has 128 divisors (see below), whose sum is σ = 519220800. Its totient is φ = 36900864.

The previous prime is 155308919. The next prime is 155308927. The reversal of 155308920 is 29803551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155308927) 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, 43524 + ... + 46956.

Almost surely, 2^155308920 is an apocalyptic number.

155308920 is a gapful number since it is divisible by the number (10) 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 155308920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259610400).

155308920 is an abundant number, since it is smaller than the sum of its proper divisors (363911880).

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

155308920 is a wasteful number, since it uses less digits than its factorization.

155308920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3485 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 155308920 is about 12462.2999482439. The cubic root of 155308920 is about 537.5251634154.

The spelling of 155308920 in words is "one hundred fifty-five million, three hundred eight thousand, nine hundred twenty".