1662793920 has 140 divisors (see below), whose sum is σ = 5914942704. Its totient is φ = 443404800.

The previous prime is 1662793907. The next prime is 1662793921. The reversal of 1662793920 is 293972661.

It is a happy number.

1662793920 is a `hidden beast` number, since 16 + 627 + 9 + 3 + 9 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1662793921) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6156 + ... + 57995.

Almost surely, 2^1662793920 is an apocalyptic number.

1662793920 is a gapful number since it is divisible by the number (10) 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 1662793920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2957471352).

1662793920 is an abundant number, since it is smaller than the sum of its proper divisors (4252148784).

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

1662793920 is an equidigital number, since it uses as much as digits as its factorization.

1662793920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64180 (or 64161 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1662793920 is about 40777.3701947539. The cubic root of 1662793920 is about 1184.7120595061.

The spelling of 1662793920 in words is "one billion, six hundred sixty-two million, seven hundred ninety-three thousand, nine hundred twenty".