155012380 has 24 divisors (see below), whose sum is σ = 327606048. Its totient is φ = 61608768.

The previous prime is 155012357. The next prime is 155012399. The reversal of 155012380 is 83210551.

It is a happy number.

155012380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 21544 + ... + 27823.

It is an arithmetic number, because the mean of its divisors is an integer number (13650252).

Almost surely, 2^155012380 is an apocalyptic number.

155012380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155012380 is an abundant number, since it is smaller than the sum of its proper divisors (172593668).

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

155012380 is a wasteful number, since it uses less digits than its factorization.

155012380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49533 (or 49531 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 155012380 is about 12450.3967808259. The cubic root of 155012380 is about 537.1828365040.

The spelling of 155012380 in words is "one hundred fifty-five million, twelve thousand, three hundred eighty".