1443820436 has 12 divisors (see below), whose sum is σ = 2549046612. Its totient is φ = 715521408.

The previous prime is 1443820409. The next prime is 1443820451. The reversal of 1443820436 is 6340283441.

It can be written as a sum of positive squares in 2 ways, for example, as 707240836 + 736579600 = 26594^2 + 27140^2 .

It is a super-2 number, since 2×1443820436² = 4169234902822460192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1443820396 and 1443820405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596695 + ... + 1597598.

It is an arithmetic number, because the mean of its divisors is an integer number (212420551).

Almost surely, 2^1443820436 is an apocalyptic number.

It is an amenable number.

1443820436 is a deficient number, since it is larger than the sum of its proper divisors (1105226176).

1443820436 is a wasteful number, since it uses less digits than its factorization.

1443820436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194410 (or 3194408 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 1443820436 is about 37997.6372423339. The cubic root of 1443820436 is about 1130.2410105396.

The spelling of 1443820436 in words is "one billion, four hundred forty-three million, eight hundred twenty thousand, four hundred thirty-six".