1662188040 has 96 divisors (see below), whose sum is σ = 5602222080. Its totient is φ = 443247552.

The previous prime is 1662188009. The next prime is 1662188051. The reversal of 1662188040 is 408812661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1662187986 and 1662188004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75784 + ... + 95223.

It is an arithmetic number, because the mean of its divisors is an integer number (58356480).

Almost surely, 2^1662188040 is an apocalyptic number.

1662188040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662188040 is an abundant number, since it is smaller than the sum of its proper divisors (3940034040).

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

1662188040 is a wasteful number, since it uses less digits than its factorization.

1662188040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171033 (or 171017 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1662188040 is about 40769.9403973074. The cubic root of 1662188040 is about 1184.5681490003.

The spelling of 1662188040 in words is "one billion, six hundred sixty-two million, one hundred eighty-eight thousand, forty".