155190320 has 20 divisors (see below), whose sum is σ = 360817680. Its totient is φ = 62076096.

The previous prime is 155190319. The next prime is 155190353. The reversal of 155190320 is 23091551.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 155190320.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969860 + ... + 970019.

It is an arithmetic number, because the mean of its divisors is an integer number (18040884).

Almost surely, 2^155190320 is an apocalyptic number.

155190320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155190320 is an abundant number, since it is smaller than the sum of its proper divisors (205627360).

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

155190320 is a wasteful number, since it uses less digits than its factorization.

155190320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939892 (or 1939886 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 155190320 is about 12457.5406882739. The cubic root of 155190320 is about 537.3883034533.

The spelling of 155190320 in words is "one hundred fifty-five million, one hundred ninety thousand, three hundred twenty".