1662386720 has 48 divisors (see below), whose sum is σ = 4062827160. Its totient is φ = 642023424.

The previous prime is 1662386699. The next prime is 1662386729. The reversal of 1662386720 is 276832661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1006412176 + 655974544 = 31724^2 + 25612^2 .

It is not an unprimeable number, because it can be changed into a prime (1662386729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174497 + ... + 183776.

Almost surely, 2^1662386720 is an apocalyptic number.

1662386720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662386720 is an abundant number, since it is smaller than the sum of its proper divisors (2400440440).

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

1662386720 is a wasteful number, since it uses less digits than its factorization.

1662386720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358317 (or 358309 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1662386720 is about 40772.3769235987. The cubic root of 1662386720 is about 1184.6153439461.

The spelling of 1662386720 in words is "one billion, six hundred sixty-two million, three hundred eighty-six thousand, seven hundred twenty".