1977380 has 12 divisors (see below), whose sum is σ = 4152540. Its totient is φ = 790944.

The previous prime is 1977361. The next prime is 1977403. The reversal of 1977380 is 837791.

It can be written as a sum of positive squares in 2 ways, for example, as 1420864 + 556516 = 1192^2 + 746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1977380.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49415 + ... + 49454.

It is an arithmetic number, because the mean of its divisors is an integer number (346045).

2^1977380 is an apocalyptic number.

1977380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977380 is an abundant number, since it is smaller than the sum of its proper divisors (2175160).

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

1977380 is a wasteful number, since it uses less digits than its factorization.

1977380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98878 (or 98876 counting only the distinct ones).

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

The square root of 1977380 is about 1406.1934433071. The cubic root of 1977380 is about 125.5153127033.

The spelling of 1977380 in words is "one million, nine hundred seventy-seven thousand, three hundred eighty".