1389690 has 32 divisors (see below), whose sum is σ = 3706560. Its totient is φ = 370512.

The previous prime is 1389677. The next prime is 1389697. The reversal of 1389690 is 969831.

It is a super-2 number, since 2×1389690² = 3862476592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2304 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (115830).

2^1389690 is an apocalyptic number.

1389690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389690 is an abundant number, since it is smaller than the sum of its proper divisors (2316870).

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

1389690 is a wasteful number, since it uses less digits than its factorization.

1389690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163 (or 5157 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1389690 is about 1178.8511356401. The cubic root of 1389690 is about 111.5936058309.

The spelling of 1389690 in words is "one million, three hundred eighty-nine thousand, six hundred ninety".