1376780 has 48 divisors (see below), whose sum is σ = 3132864. Its totient is φ = 506880.

The previous prime is 1376777. The next prime is 1376789. The reversal of 1376780 is 876731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376789) 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, 18824 + ... + 18896.

It is an arithmetic number, because the mean of its divisors is an integer number (65268).

2^1376780 is an apocalyptic number.

1376780 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 1376780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566432).

1376780 is an abundant number, since it is smaller than the sum of its proper divisors (1756084).

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

1376780 is a wasteful number, since it uses less digits than its factorization.

1376780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1376780 is about 1173.3626890267. The cubic root of 1376780 is about 111.2469678928.

The spelling of 1376780 in words is "one million, three hundred seventy-six thousand, seven hundred eighty".