1027780 has 48 divisors (see below), whose sum is σ = 2399040. Its totient is φ = 367488.

The previous prime is 1027777. The next prime is 1027783. The reversal of 1027780 is 877201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1027777) and next prime (1027783).

It is not an unprimeable number, because it can be changed into a prime (1027783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15307 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (49980).

2^1027780 is an apocalyptic number.

1027780 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 1027780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199520).

1027780 is an abundant number, since it is smaller than the sum of its proper divisors (1371260).

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

1027780 is a wasteful number, since it uses less digits than its factorization.

1027780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 1027780 is about 1013.7948510424. The cubic root of 1027780 is about 100.9175551751.

The spelling of 1027780 in words is "one million, twenty-seven thousand, seven hundred eighty".