155140390 has 16 divisors (see below), whose sum is σ = 279482400. Its totient is φ = 62005120.

The previous prime is 155140379. The next prime is 155140409. The reversal of 155140390 is 93041551.

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 7 ways as a sum of consecutive naturals, for example, 7911 + ... + 19309.

It is an arithmetic number, because the mean of its divisors is an integer number (17467650).

Almost surely, 2^155140390 is an apocalyptic number.

155140390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155140390 is a deficient number, since it is larger than the sum of its proper divisors (124342010).

155140390 is a wasteful number, since it uses less digits than its factorization.

155140390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12767.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 155140390 is about 12455.5365199577. The cubic root of 155140390 is about 537.3306652448.

The spelling of 155140390 in words is "one hundred fifty-five million, one hundred forty thousand, three hundred ninety".