1376820 has 36 divisors (see below), whose sum is σ = 4176900. Its totient is φ = 367104.

The previous prime is 1376819. The next prime is 1376827. The reversal of 1376820 is 286731.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 1140624 = 486^2 + 1068^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3645 + ... + 4004.

It is an arithmetic number, because the mean of its divisors is an integer number (116025).

2^1376820 is an apocalyptic number.

1376820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1376820 is an abundant number, since it is smaller than the sum of its proper divisors (2800080).

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

1376820 is a wasteful number, since it uses less digits than its factorization.

1376820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7664 (or 7659 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1376820 is about 1173.3797339310. The cubic root of 1376820 is about 111.2480452461.

The spelling of 1376820 in words is "one million, three hundred seventy-six thousand, eight hundred twenty".