155948990 has 32 divisors (see below), whose sum is σ = 297851904. Its totient is φ = 58585600.

The previous prime is 155948987. The next prime is 155949011. The reversal of 155948990 is 99849551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134915 + ... + 136065.

It is an arithmetic number, because the mean of its divisors is an integer number (9307872).

Almost surely, 2^155948990 is an apocalyptic number.

155948990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155948990 is a deficient number, since it is larger than the sum of its proper divisors (141902914).

155948990 is a wasteful number, since it uses less digits than its factorization.

155948990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 155948990 is about 12487.9537955583. The cubic root of 155948990 is about 538.2625800953.

The spelling of 155948990 in words is "one hundred fifty-five million, nine hundred forty-eight thousand, nine hundred ninety".