1045186820 has 12 divisors (see below), whose sum is σ = 2194892364. Its totient is φ = 418074720.

The previous prime is 1045186819. The next prime is 1045186823. The reversal of 1045186820 is 286815401.

It can be written as a sum of positive squares in 2 ways, for example, as 832668736 + 212518084 = 28856^2 + 14578^2 .

It is not an unprimeable number, because it can be changed into a prime (1045186823) 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, 26129651 + ... + 26129690.

It is an arithmetic number, because the mean of its divisors is an integer number (182907697).

Almost surely, 2^1045186820 is an apocalyptic number.

1045186820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045186820 is an abundant number, since it is smaller than the sum of its proper divisors (1149705544).

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

1045186820 is a wasteful number, since it uses less digits than its factorization.

1045186820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52259350 (or 52259348 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 1045186820 is about 32329.3492047087. The cubic root of 1045186820 is about 1014.8409305269.

The spelling of 1045186820 in words is "one billion, forty-five million, one hundred eighty-six thousand, eight hundred twenty".