1662563240 has 64 divisors (see below), whose sum is σ = 4038249600. Its totient is φ = 612387072.

The previous prime is 1662563233. The next prime is 1662563267. The reversal of 1662563240 is 423652661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1662563240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224639 + ... + 231921.

It is an arithmetic number, because the mean of its divisors is an integer number (63097650).

Almost surely, 2^1662563240 is an apocalyptic number.

1662563240 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 1662563240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019124800).

1662563240 is an abundant number, since it is smaller than the sum of its proper divisors (2375686360).

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

1662563240 is a wasteful number, since it uses less digits than its factorization.

1662563240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746 (or 7742 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1662563240 is about 40774.5415670121. The cubic root of 1662563240 is about 1184.6572717954.

The spelling of 1662563240 in words is "one billion, six hundred sixty-two million, five hundred sixty-three thousand, two hundred forty".