1803697038 has 128 divisors (see below), whose sum is σ = 4741148160. Its totient is φ = 501085440.

The previous prime is 1803697031. The next prime is 1803697039. The reversal of 1803697038 is 8307963081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1803696984 and 1803697002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803697031) 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, 1257970 + ... + 1259402.

It is an arithmetic number, because the mean of its divisors is an integer number (37040220).

Almost surely, 2^1803697038 is an apocalyptic number.

1803697038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1803697038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370574080).

1803697038 is an abundant number, since it is smaller than the sum of its proper divisors (2937451122).

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

1803697038 is a wasteful number, since it uses less digits than its factorization.

1803697038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1803697038 is about 42469.9545325869. The cubic root of 1803697038 is about 1217.2726492855.

The spelling of 1803697038 in words is "one billion, eight hundred three million, six hundred ninety-seven thousand, thirty-eight".