1399730 has 32 divisors (see below), whose sum is σ = 2721600. Its totient is φ = 516672.

The previous prime is 1399721. The next prime is 1399733. The reversal of 1399730 is 379931.

1399730 = T₄₅ + T₄₆ + ... + T₂₀₃.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1399733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10001 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2^1399730 is an apocalyptic number.

1399730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1399730 is a deficient number, since it is larger than the sum of its proper divisors (1321870).

1399730 is a wasteful number, since it uses less digits than its factorization.

1399730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 1399730 is about 1183.1018552940. The cubic root of 1399730 is about 111.8617021740.

The spelling of 1399730 in words is "one million, three hundred ninety-nine thousand, seven hundred thirty".