1778348142 has 64 divisors (see below), whose sum is σ = 4006679040. Its totient is φ = 584610048.

The previous prime is 1778348141. The next prime is 1778348171. The reversal of 1778348142 is 2418438771.

It is a super-2 number, since 2×1778348142² = 6325044228309704328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778348141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2445783 + ... + 2446509.

It is an arithmetic number, because the mean of its divisors is an integer number (62604360).

Almost surely, 2^1778348142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778348142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2003339520).

1778348142 is an abundant number, since it is smaller than the sum of its proper divisors (2228330898).

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

1778348142 is a wasteful number, since it uses less digits than its factorization.

1778348142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1296 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 1778348142 is about 42170.4652808100. The cubic root of 1778348142 is about 1211.5432672742.

The spelling of 1778348142 in words is "one billion, seven hundred seventy-eight million, three hundred forty-eight thousand, one hundred forty-two".