1778130 has 48 divisors (see below), whose sum is σ = 4829760. Its totient is φ = 453024.

The previous prime is 1778111. The next prime is 1778137. The reversal of 1778130 is 318771.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1778094 and 1778103.

It is not an unprimeable number, because it can be changed into a prime (1778137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1641 + ... + 2499.

It is an arithmetic number, because the mean of its divisors is an integer number (100620).

2^1778130 is an apocalyptic number.

1778130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414880).

1778130 is an abundant number, since it is smaller than the sum of its proper divisors (3051630).

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

1778130 is a wasteful number, since it uses less digits than its factorization.

1778130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 1778130 is about 1333.4654101251. The cubic root of 1778130 is about 121.1493727053.

The spelling of 1778130 in words is "one million, seven hundred seventy-eight thousand, one hundred thirty".