1662494208 has 80 divisors (see below), whose sum is σ = 4532168256. Its totient is φ = 541255680.

The previous prime is 1662494173. The next prime is 1662494221. The reversal of 1662494208 is 8024942661.

It is a self number, because there is not a number n which added to its sum of digits gives 1662494208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53463 + ... + 78633.

Almost surely, 2^1662494208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662494208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2266084128).

1662494208 is an abundant number, since it is smaller than the sum of its proper divisors (2869674048).

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

1662494208 is an equidigital number, since it uses as much as digits as its factorization.

1662494208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25235 (or 25219 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1662494208 is about 40773.6950496273. The cubic root of 1662494208 is about 1184.6408753479.

The spelling of 1662494208 in words is "one billion, six hundred sixty-two million, four hundred ninety-four thousand, two hundred eight".