1399660 has 24 divisors (see below), whose sum is σ = 3003840. Its totient is φ = 547584.

The previous prime is 1399639. The next prime is 1399663. The reversal of 1399660 is 669931.

It is not an unprimeable number, because it can be changed into a prime (1399663) 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, 196 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (125160).

2^1399660 is an apocalyptic number.

1399660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399660 is an abundant number, since it is smaller than the sum of its proper divisors (1604180).

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

1399660 is a wasteful number, since it uses less digits than its factorization.

1399660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1399660 is about 1183.0722716724. The cubic root of 1399660 is about 111.8598374216.

The spelling of 1399660 in words is "one million, three hundred ninety-nine thousand, six hundred sixty".