1980477 has 8 divisors (see below), whose sum is σ = 2934080. Its totient is φ = 1320300.

The previous prime is 1980469. The next prime is 1980491. The reversal of 1980477 is 7740891.

It is not a de Polignac number, because 1980477 - 2³ = 1980469 is a prime.

It is a Duffinian number.

1980477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36649 + ... + 36702.

It is an arithmetic number, because the mean of its divisors is an integer number (366760).

2^1980477 is an apocalyptic number.

It is an amenable number.

1980477 is a deficient number, since it is larger than the sum of its proper divisors (953603).

1980477 is an equidigital number, since it uses as much as digits as its factorization.

1980477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73360 (or 73354 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1980477 is about 1407.2942123096. The cubic root of 1980477 is about 125.5808064644.

It can be divided in two parts, 19804 and 77, that added together give a square (19881 = 141²).

The spelling of 1980477 in words is "one million, nine hundred eighty thousand, four hundred seventy-seven".