1621893080 has 16 divisors (see below), whose sum is σ = 3649259520. Its totient is φ = 648757216.

The previous prime is 1621893079. The next prime is 1621893089. The reversal of 1621893080 is 803981261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621893089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20273624 + ... + 20273703.

It is an arithmetic number, because the mean of its divisors is an integer number (228078720).

Almost surely, 2^1621893080 is an apocalyptic number.

1621893080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1621893080 is an abundant number, since it is smaller than the sum of its proper divisors (2027366440).

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

1621893080 is a wasteful number, since it uses less digits than its factorization.

1621893080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40547338 (or 40547334 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1621893080 is about 40272.7337040832. The cubic root of 1621893080 is about 1174.9175931342.

The spelling of 1621893080 in words is "one billion, six hundred twenty-one million, eight hundred ninety-three thousand, eighty".