1820904030 has 64 divisors (see below), whose sum is σ = 5297184000. Its totient is φ = 441430560.

The previous prime is 1820904011. The next prime is 1820904037. The reversal of 1820904030 is 304090281.

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

It is a junction number, because it is equal to n+sod(n) for n = 1820903985 and 1820904003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820904037) 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, 303580 + ... + 309519.

It is an arithmetic number, because the mean of its divisors is an integer number (82768500).

Almost surely, 2^1820904030 is an apocalyptic number.

1820904030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1820904030 is an abundant number, since it is smaller than the sum of its proper divisors (3476279970).

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

1820904030 is a wasteful number, since it uses less digits than its factorization.

1820904030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613126 (or 613120 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1820904030 is about 42672.0520950188. The cubic root of 1820904030 is about 1221.1312695045.

The spelling of 1820904030 in words is "one billion, eight hundred twenty million, nine hundred four thousand, thirty".