1622988921 has 8 divisors (see below), whose sum is σ = 2178316864. Its totient is φ = 1074826800.

The previous prime is 1622988863. The next prime is 1622988971. The reversal of 1622988921 is 1298892261.

1622988921 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1622988921 - 2¹⁰ = 1622987897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1622988971) 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, 1790926 + ... + 1791831.

It is an arithmetic number, because the mean of its divisors is an integer number (272289608).

Almost surely, 2^1622988921 is an apocalyptic number.

It is an amenable number.

1622988921 is a deficient number, since it is larger than the sum of its proper divisors (555327943).

1622988921 is a wasteful number, since it uses less digits than its factorization.

1622988921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582911.

The product of its digits is 248832, while the sum is 48.

The square root of 1622988921 is about 40286.3366540071. The cubic root of 1622988921 is about 1175.1821467436.

The spelling of 1622988921 in words is "one billion, six hundred twenty-two million, nine hundred eighty-eight thousand, nine hundred twenty-one".