1623660 has 24 divisors (see below), whose sum is σ = 4546416. Its totient is φ = 432960.

The previous prime is 1623647. The next prime is 1623667. The reversal of 1623660 is 663261.

It is a self number, because there is not a number n which added to its sum of digits gives 1623660.

It is not an unprimeable number, because it can be changed into a prime (1623667) 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, 13471 + ... + 13590.

It is an arithmetic number, because the mean of its divisors is an integer number (189434).

2^1623660 is an apocalyptic number.

1623660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623660 is an abundant number, since it is smaller than the sum of its proper divisors (2922756).

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

1623660 is a wasteful number, since it uses less digits than its factorization.

1623660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27073 (or 27071 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1623660 is about 1274.2291787587. The cubic root of 1623660 is about 117.5344097200.

The spelling of 1623660 in words is "one million, six hundred twenty-three thousand, six hundred sixty".