1377980 has 12 divisors (see below), whose sum is σ = 2893800. Its totient is φ = 551184.

The previous prime is 1377977. The next prime is 1377983. The reversal of 1377980 is 897731.

It is an interprime number because it is at equal distance from previous prime (1377977) and next prime (1377983).

It is a self number, because there is not a number n which added to its sum of digits gives 1377980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34430 + ... + 34469.

It is an arithmetic number, because the mean of its divisors is an integer number (241150).

2^1377980 is an apocalyptic number.

1377980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377980 is an abundant number, since it is smaller than the sum of its proper divisors (1515820).

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

1377980 is a wasteful number, since it uses less digits than its factorization.

1377980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68908 (or 68906 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1377980 is about 1173.8739284949. The cubic root of 1377980 is about 111.2792794204.

Subtracting from 1377980 its reverse (897731), we obtain a square (480249 = 693²).

The spelling of 1377980 in words is "one million, three hundred seventy-seven thousand, nine hundred eighty".