1810802142 has 40 divisors (see below), whose sum is σ = 4074602400. Its totient is φ = 601062336.

The previous prime is 1810802129. The next prime is 1810802143. The reversal of 1810802142 is 2412080181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1810802143) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15334 + ... + 62102.

It is an arithmetic number, because the mean of its divisors is an integer number (101865060).

Almost surely, 2^1810802142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1810802142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037301200).

1810802142 is an abundant number, since it is smaller than the sum of its proper divisors (2263800258).

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

1810802142 is a wasteful number, since it uses less digits than its factorization.

1810802142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47022 (or 47013 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 1810802142 is about 42553.5209119058. The cubic root of 1810802142 is about 1218.8689109066.

The spelling of 1810802142 in words is "one billion, eight hundred ten million, eight hundred two thousand, one hundred forty-two".