155928390 has 32 divisors (see below), whose sum is σ = 375878880. Its totient is φ = 41397504.

The previous prime is 155928379. The next prime is 155928407. The reversal of 155928390 is 93829551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4479 + ... + 18218.

It is an arithmetic number, because the mean of its divisors is an integer number (11746215).

Almost surely, 2^155928390 is an apocalyptic number.

155928390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155928390 is an abundant number, since it is smaller than the sum of its proper divisors (219950490).

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

155928390 is a wasteful number, since it uses less digits than its factorization.

155928390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22936.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 155928390 is about 12487.1289734670. The cubic root of 155928390 is about 538.2388785473.

The spelling of 155928390 in words is "one hundred fifty-five million, nine hundred twenty-eight thousand, three hundred ninety".