155571428 has 24 divisors (see below), whose sum is σ = 282252600. Its totient is φ = 74939648.

The previous prime is 155571419. The next prime is 155571433. The reversal of 155571428 is 824175551.

It can be written as a sum of positive squares in 4 ways, for example, as 369664 + 155201764 = 608^2 + 12458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155571391 and 155571400.

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, 64826 + ... + 67182.

It is an arithmetic number, because the mean of its divisors is an integer number (11760525).

Almost surely, 2^155571428 is an apocalyptic number.

It is an amenable number.

155571428 is a deficient number, since it is larger than the sum of its proper divisors (126681172).

155571428 is a wasteful number, since it uses less digits than its factorization.

155571428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959 (or 2957 counting only the distinct ones).

The product of its digits is 56000, while the sum is 38.

The square root of 155571428 is about 12472.8275863976. The cubic root of 155571428 is about 537.8278402360.

The spelling of 155571428 in words is "one hundred fifty-five million, five hundred seventy-one thousand, four hundred twenty-eight".