1972780 has 12 divisors (see below), whose sum is σ = 4142880. Its totient is φ = 789104.

The previous prime is 1972777. The next prime is 1972781. The reversal of 1972780 is 872791.

It is a super-3 number, since 3×1972780³ = 23033356206986856000, which contains 333 as substring.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 1972 and 780 contains 1972780 itself.

It is not an unprimeable number, because it can be changed into a prime (1972781) 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, 49300 + ... + 49339.

It is an arithmetic number, because the mean of its divisors is an integer number (345240).

2^1972780 is an apocalyptic number.

1972780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1972780 is an abundant number, since it is smaller than the sum of its proper divisors (2170100).

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

1972780 is a wasteful number, since it uses less digits than its factorization.

1972780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98648 (or 98646 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1972780 is about 1404.5568696212. The cubic root of 1972780 is about 125.4179079333.

The spelling of 1972780 in words is "one million, nine hundred seventy-two thousand, seven hundred eighty".