180155380 has 48 divisors (see below), whose sum is σ = 389055744. Its totient is φ = 70035840.

The previous prime is 180155377. The next prime is 180155383. The reversal of 180155380 is 83551081.

It is an interprime number because it is at equal distance from previous prime (180155377) and next prime (180155383).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180155383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232674 + ... + 233446.

It is an arithmetic number, because the mean of its divisors is an integer number (8105328).

Almost surely, 2^180155380 is an apocalyptic number.

180155380 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 180155380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194527872).

180155380 is an abundant number, since it is smaller than the sum of its proper divisors (208900364).

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

180155380 is a wasteful number, since it uses less digits than its factorization.

180155380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 180155380 is about 13422.1972865846. The cubic root of 180155380 is about 564.7840352457.

The spelling of 180155380 in words is "one hundred eighty million, one hundred fifty-five thousand, three hundred eighty".