1840143428 has 36 divisors (see below), whose sum is σ = 3374459088. Its totient is φ = 877950480.

The previous prime is 1840143397. The next prime is 1840143457. The reversal of 1840143428 is 8243410481.

It is a super-2 number, since 2×1840143428² = 6772255671223182368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1207475 + ... + 1208997.

Almost surely, 2^1840143428 is an apocalyptic number.

It is an amenable number.

1840143428 is a deficient number, since it is larger than the sum of its proper divisors (1534315660).

1840143428 is a wasteful number, since it uses less digits than its factorization.

1840143428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 1840143428 is about 42896.8929877212. The cubic root of 1840143428 is about 1225.4169738088.

The spelling of 1840143428 in words is "one billion, eight hundred forty million, one hundred forty-three thousand, four hundred twenty-eight".