1620466 has 8 divisors (see below), whose sum is σ = 2482560. Its totient is φ = 792948.

The previous prime is 1620461. The next prime is 1620467. The reversal of 1620466 is 6640261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1620466.

It is not an unprimeable number, because it can be changed into a prime (1620461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8526 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (310320).

2^1620466 is an apocalyptic number.

1620466 is a deficient number, since it is larger than the sum of its proper divisors (862094).

1620466 is a wasteful number, since it uses less digits than its factorization.

1620466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17288.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1620466 is about 1272.9752550619. The cubic root of 1620466 is about 117.4572894414.

The spelling of 1620466 in words is "one million, six hundred twenty thousand, four hundred sixty-six".