155040890 has 8 divisors (see below), whose sum is σ = 279073620. Its totient is φ = 62016352.

The previous prime is 155040887. The next prime is 155040913. The reversal of 155040890 is 98040551.

It can be written as a sum of positive squares in 2 ways, for example, as 145853929 + 9186961 = 12077^2 + 3031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 7752035 + ... + 7752054.

Almost surely, 2^155040890 is an apocalyptic number.

155040890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155040890 is a deficient number, since it is larger than the sum of its proper divisors (124032730).

155040890 is a wasteful number, since it uses less digits than its factorization.

155040890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15504096.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 155040890 is about 12451.5416716164. The cubic root of 155040890 is about 537.2157675164.

The spelling of 155040890 in words is "one hundred fifty-five million, forty thousand, eight hundred ninety".