155898380 has 48 divisors (see below), whose sum is σ = 368686080. Its totient is φ = 54859200.

The previous prime is 155898373. The next prime is 155898409. The reversal of 155898380 is 83898551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4610 + ... + 18249.

It is an arithmetic number, because the mean of its divisors is an integer number (7680960).

Almost surely, 2^155898380 is an apocalyptic number.

155898380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155898380 is an abundant number, since it is smaller than the sum of its proper divisors (212787700).

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

155898380 is a wasteful number, since it uses less digits than its factorization.

155898380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22910 (or 22908 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 155898380 is about 12485.9272783402. The cubic root of 155898380 is about 538.2043464883.

The spelling of 155898380 in words is "one hundred fifty-five million, eight hundred ninety-eight thousand, three hundred eighty".