1443622420 has 24 divisors (see below), whose sum is σ = 3042805248. Its totient is φ = 575316000.

The previous prime is 1443622387. The next prime is 1443622421. The reversal of 1443622420 is 242263441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443622421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127756 + ... + 138595.

It is an arithmetic number, because the mean of its divisors is an integer number (126783552).

Almost surely, 2^1443622420 is an apocalyptic number.

1443622420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1443622420 is an abundant number, since it is smaller than the sum of its proper divisors (1599182828).

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

1443622420 is a wasteful number, since it uses less digits than its factorization.

1443622420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266631 (or 266629 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 1443622420 is about 37995.0315172918. The cubic root of 1443622420 is about 1130.1893383625.

Adding to 1443622420 its reverse (242263441), we get a palindrome (1685885861).

It can be divided in two parts, 14436 and 22420, that added together give a triangular number (36856 = T₂₇₁).

The spelling of 1443622420 in words is "one billion, four hundred forty-three million, six hundred twenty-two thousand, four hundred twenty".