1662272928 has 120 divisors (see below), whose sum is σ = 5101433568. Its totient is φ = 529981056.

The previous prime is 1662272897. The next prime is 1662272959. The reversal of 1662272928 is 8292722661.

1662272928 is a `hidden beast` number, since 16 + 622 + 7 + 2 + 9 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1662272897) and next prime (1662272959).

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 19 ways as a sum of consecutive naturals, for example, 45675 + ... + 73557.

Almost surely, 2^1662272928 is an apocalyptic number.

1662272928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662272928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2550716784).

1662272928 is an abundant number, since it is smaller than the sum of its proper divisors (3439160640).

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

1662272928 is a wasteful number, since it uses less digits than its factorization.

1662272928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27928 (or 27911 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1662272928 is about 40770.9814451406. The cubic root of 1662272928 is about 1184.5883139690.

The spelling of 1662272928 in words is "one billion, six hundred sixty-two million, two hundred seventy-two thousand, nine hundred twenty-eight".