155278448 has 20 divisors (see below), whose sum is σ = 323994888. Its totient is φ = 71666880.

The previous prime is 155278397. The next prime is 155278471. The reversal of 155278448 is 844872551.

It is a super-2 number, since 2×155278448² = 48222792826577408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155278399 and 155278408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373058 + ... + 373473.

Almost surely, 2^155278448 is an apocalyptic number.

It is an amenable number.

155278448 is an abundant number, since it is smaller than the sum of its proper divisors (168716440).

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

155278448 is a wasteful number, since it uses less digits than its factorization.

155278448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746552 (or 746546 counting only the distinct ones).

The product of its digits is 358400, while the sum is 44.

The square root of 155278448 is about 12461.0773210024. The cubic root of 155278448 is about 537.4900065205.

The spelling of 155278448 in words is "one hundred fifty-five million, two hundred seventy-eight thousand, four hundred forty-eight".