155984378 has 16 divisors (see below), whose sum is σ = 262147104. Its totient is φ = 68985360.

The previous prime is 155984371. The next prime is 155984383. The reversal of 155984378 is 873489551.

It is a super-2 number, since 2×155984378² = 48662252360093768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155984371) by changing a digit.

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, 95000 + ... + 96627.

It is an arithmetic number, because the mean of its divisors is an integer number (16384194).

Almost surely, 2^155984378 is an apocalyptic number.

155984378 is a deficient number, since it is larger than the sum of its proper divisors (106162726).

155984378 is a wasteful number, since it uses less digits than its factorization.

155984378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191677.

The product of its digits is 1209600, while the sum is 50.

The square root of 155984378 is about 12489.3706006348. The cubic root of 155984378 is about 538.3032912611.

The spelling of 155984378 in words is "one hundred fifty-five million, nine hundred eighty-four thousand, three hundred seventy-eight".