1378980 has 72 divisors (see below), whose sum is σ = 4298112. Its totient is φ = 357696.

The previous prime is 1378969. The next prime is 1378997. The reversal of 1378980 is 898731.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8379 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (59696).

2^1378980 is an apocalyptic number.

1378980 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 1378980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149056).

1378980 is an abundant number, since it is smaller than the sum of its proper divisors (2919132).

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

1378980 is a wasteful number, since it uses less digits than its factorization.

1378980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1378980 is about 1174.2997913651. The cubic root of 1378980 is about 111.3061913669.

Subtracting from 1378980 its reverse (898731), we obtain a square (480249 = 693²).

The spelling of 1378980 in words is "one million, three hundred seventy-eight thousand, nine hundred eighty".