1379920 has 40 divisors (see below), whose sum is σ = 3285504. Its totient is φ = 538752.

The previous prime is 1379897. The next prime is 1379923. The reversal of 1379920 is 299731.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379923) 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, 3577 + ... + 3943.

2^1379920 is an apocalyptic number.

1379920 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 1379920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642752).

1379920 is an abundant number, since it is smaller than the sum of its proper divisors (1905584).

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

1379920 is a wasteful number, since it uses less digits than its factorization.

1379920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1379920 is about 1174.6999616923. The cubic root of 1379920 is about 111.3314767361.

The spelling of 1379920 in words is "one million, three hundred seventy-nine thousand, nine hundred twenty".