1977320 has 16 divisors (see below), whose sum is σ = 4449060. Its totient is φ = 790912.

The previous prime is 1977319. The next prime is 1977323. The reversal of 1977320 is 237791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1976836 + 484 = 1406^2 + 22^2 .

It is not an unprimeable number, because it can be changed into a prime (1977323) 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, 24677 + ... + 24756.

2^1977320 is an apocalyptic number.

1977320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977320 is an abundant number, since it is smaller than the sum of its proper divisors (2471740).

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

1977320 is a wasteful number, since it uses less digits than its factorization.

1977320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49444 (or 49440 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 1977320 is about 1406.1721089540. The cubic root of 1977320 is about 125.5140431792.

The spelling of 1977320 in words is "one million, nine hundred seventy-seven thousand, three hundred twenty".