1620967750 has 16 divisors (see below), whose sum is σ = 3034452096. Its totient is φ = 648387000.

The previous prime is 1620967721. The next prime is 1620967781. The reversal of 1620967750 is 577690261.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1620967697 and 1620967706.

It is a congruent number.

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, 3241686 + ... + 3242185.

It is an arithmetic number, because the mean of its divisors is an integer number (189653256).

Almost surely, 2^1620967750 is an apocalyptic number.

1620967750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620967750 is a deficient number, since it is larger than the sum of its proper divisors (1413484346).

1620967750 is an equidigital number, since it uses as much as digits as its factorization.

1620967750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483888 (or 6483878 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 1620967750 is about 40261.2437711504. The cubic root of 1620967750 is about 1174.6941108075.

The spelling of 1620967750 in words is "one billion, six hundred twenty million, nine hundred sixty-seven thousand, seven hundred fifty".