1623421072 has 40 divisors (see below), whose sum is σ = 3871238336. Its totient is φ = 642231936.

The previous prime is 1623421057. The next prime is 1623421081. The reversal of 1623421072 is 2701243261.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1623421072.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556038 + ... + 558949.

Almost surely, 2^1623421072 is an apocalyptic number.

It is an amenable number.

1623421072 is an abundant number, since it is smaller than the sum of its proper divisors (2247817264).

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

1623421072 is a wasteful number, since it uses less digits than its factorization.

1623421072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115015 (or 1115009 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1623421072 is about 40291.6997904035. The cubic root of 1623421072 is about 1175.2864421918.

The spelling of 1623421072 in words is "one billion, six hundred twenty-three million, four hundred twenty-one thousand, seventy-two".