1856428148 has 6 divisors (see below), whose sum is σ = 3248749266. Its totient is φ = 928214072.

The previous prime is 1856428111. The next prime is 1856428163. The reversal of 1856428148 is 8418246581.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 974813284 + 881614864 = 31222^2 + 29692^2 .

It is a super-3 number, since 3×1856428148³ (a number of 29 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 232053515 + ... + 232053522.

It is an arithmetic number, because the mean of its divisors is an integer number (541458211).

Almost surely, 2^1856428148 is an apocalyptic number.

It is an amenable number.

1856428148 is a deficient number, since it is larger than the sum of its proper divisors (1392321118).

1856428148 is a wasteful number, since it uses less digits than its factorization.

1856428148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464107041 (or 464107039 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 1856428148 is about 43086.2872385171. The cubic root of 1856428148 is about 1229.0212205883.

The spelling of 1856428148 in words is "one billion, eight hundred fifty-six million, four hundred twenty-eight thousand, one hundred forty-eight".