1622453918 has 4 divisors (see below), whose sum is σ = 2433680880. Its totient is φ = 811226958.

The previous prime is 1622453881. The next prime is 1622453929. The reversal of 1622453918 is 8193542261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8193542261 = 53 ⋅154595137.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405613478 + ... + 405613481.

It is an arithmetic number, because the mean of its divisors is an integer number (608420220).

Almost surely, 2^1622453918 is an apocalyptic number.

1622453918 is a deficient number, since it is larger than the sum of its proper divisors (811226962).

1622453918 is an equidigital number, since it uses as much as digits as its factorization.

1622453918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811226961.

The product of its digits is 103680, while the sum is 41.

The square root of 1622453918 is about 40279.6961011376. The cubic root of 1622453918 is about 1175.0530033130.

The spelling of 1622453918 in words is "one billion, six hundred twenty-two million, four hundred fifty-three thousand, nine hundred eighteen".