1622743380 has 72 divisors (see below), whose sum is σ = 5136348672. Its totient is φ = 413916096.

The previous prime is 1622743379. The next prime is 1622743399. The reversal of 1622743380 is 833472261.

It is a happy number.

1622743380 is a `hidden beast` number, since 1 + 6 + 2 + 274 + 3 + 380 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 191844 + ... + 200123.

It is an arithmetic number, because the mean of its divisors is an integer number (71338176).

Almost surely, 2^1622743380 is an apocalyptic number.

1622743380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1622743380 is an abundant number, since it is smaller than the sum of its proper divisors (3513605292).

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

1622743380 is a wasteful number, since it uses less digits than its factorization.

1622743380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392005 (or 392000 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1622743380 is about 40283.2890911355. The cubic root of 1622743380 is about 1175.1228795588.

The spelling of 1622743380 in words is "one billion, six hundred twenty-two million, seven hundred forty-three thousand, three hundred eighty".