1379280 has 80 divisors (see below), whose sum is σ = 4892544. Its totient is φ = 314880.

The previous prime is 1379263. The next prime is 1379291. The reversal of 1379280 is 829731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 2090.

2^1379280 is an apocalyptic number.

1379280 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 1379280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2446272).

1379280 is an abundant number, since it is smaller than the sum of its proper divisors (3513264).

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

1379280 is a wasteful number, since it uses less digits than its factorization.

1379280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1379280 is about 1174.4275201135. The cubic root of 1379280 is about 111.3142624136.

The spelling of 1379280 in words is "one million, three hundred seventy-nine thousand, two hundred eighty".