1620789948 has 36 divisors (see below), whose sum is σ = 4098305848. Its totient is φ = 540090720.

The previous prime is 1620789941. The next prime is 1620789949. The reversal of 1620789948 is 8499870261.

1620789948 is a `hidden beast` number, since 1 + 620 + 7 + 8 + 9 + 9 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1620789894 and 1620789903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620789941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160818 + ... + 170598.

Almost surely, 2^1620789948 is an apocalyptic number.

1620789948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1620789948 is an abundant number, since it is smaller than the sum of its proper divisors (2477515900).

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

1620789948 is a wasteful number, since it uses less digits than its factorization.

1620789948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14394 (or 14389 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1620789948 is about 40259.0356069293. The cubic root of 1620789948 is about 1174.6511589763.

The spelling of 1620789948 in words is "one billion, six hundred twenty million, seven hundred eighty-nine thousand, nine hundred forty-eight".