1369920 has 56 divisors (see below), whose sum is σ = 4352544. Its totient is φ = 365056.

The previous prime is 1369897. The next prime is 1369943. The reversal of 1369920 is 299631.

It is an interprime number because it is at equal distance from previous prime (1369897) and next prime (1369943).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (77724).

2^1369920 is an apocalyptic number.

1369920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1369920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2176272).

1369920 is an abundant number, since it is smaller than the sum of its proper divisors (2982624).

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

1369920 is a wasteful number, since it uses less digits than its factorization.

1369920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1369920 is about 1170.4358162667. The cubic root of 1369920 is about 111.0618922748.

The spelling of 1369920 in words is "one million, three hundred sixty-nine thousand, nine hundred twenty".