155039380 has 12 divisors (see below), whose sum is σ = 325582740. Its totient is φ = 62015744.

The previous prime is 155039377. The next prime is 155039387. The reversal of 155039380 is 83930551.

It can be written as a sum of positive squares in 2 ways, for example, as 17023876 + 138015504 = 4126^2 + 11748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155039387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3875965 + ... + 3876004.

It is an arithmetic number, because the mean of its divisors is an integer number (27131895).

Almost surely, 2^155039380 is an apocalyptic number.

155039380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155039380 is an abundant number, since it is smaller than the sum of its proper divisors (170543360).

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

155039380 is a wasteful number, since it uses less digits than its factorization.

155039380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751978 (or 7751976 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 155039380 is about 12451.4810364069. The cubic root of 155039380 is about 537.2140234638.

The spelling of 155039380 in words is "one hundred fifty-five million, thirty-nine thousand, three hundred eighty".