1621623352 has 8 divisors (see below), whose sum is σ = 3040543800. Its totient is φ = 810811672.

The previous prime is 1621623317. The next prime is 1621623359. The reversal of 1621623352 is 2533261261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621623359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101351452 + ... + 101351467.

It is an arithmetic number, because the mean of its divisors is an integer number (380067975).

Almost surely, 2^1621623352 is an apocalyptic number.

It is an amenable number.

1621623352 is a deficient number, since it is larger than the sum of its proper divisors (1418920448).

1621623352 is a wasteful number, since it uses less digits than its factorization.

1621623352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202702925 (or 202702921 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1621623352 is about 40269.3847978834. The cubic root of 1621623352 is about 1174.8524581908.

The spelling of 1621623352 in words is "one billion, six hundred twenty-one million, six hundred twenty-three thousand, three hundred fifty-two".