1628162722 has 4 divisors (see below), whose sum is σ = 2442244086. Its totient is φ = 814081360.

The previous prime is 1628162719. The next prime is 1628162729. The reversal of 1628162722 is 2272618261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1552281201 + 75881521 = 39399^2 + 8711^2 .

It is not an unprimeable number, because it can be changed into a prime (1628162729) by changing a digit.

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 as a sum of consecutive naturals, namely, 407040679 + ... + 407040682.

Almost surely, 2^1628162722 is an apocalyptic number.

1628162722 is a deficient number, since it is larger than the sum of its proper divisors (814081364).

1628162722 is an equidigital number, since it uses as much as digits as its factorization.

1628162722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814081363.

The product of its digits is 32256, while the sum is 37.

The square root of 1628162722 is about 40350.4984108003. The cubic root of 1628162722 is about 1176.4295796091.

It can be divided in two parts, 16281 and 62722, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 1628162722 in words is "one billion, six hundred twenty-eight million, one hundred sixty-two thousand, seven hundred twenty-two".