1804138245 has 64 divisors (see below), whose sum is σ = 3947543040. Its totient is φ = 761301504.

The previous prime is 1804138207. The next prime is 1804138249. The reversal of 1804138245 is 5428314081.

1804138245 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1804138245 - 2⁷ = 1804138117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804138249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61144 + ... + 85713.

It is an arithmetic number, because the mean of its divisors is an integer number (61680360).

Almost surely, 2^1804138245 is an apocalyptic number.

1804138245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1804138245 is an abundant number, since it is smaller than the sum of its proper divisors (2143404795).

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

1804138245 is a wasteful number, since it uses less digits than its factorization.

1804138245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146891 (or 146885 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 1804138245 is about 42475.1485577155. The cubic root of 1804138245 is about 1217.3718945980.

The spelling of 1804138245 in words is "one billion, eight hundred four million, one hundred thirty-eight thousand, two hundred forty-five".