803949840 has 160 divisors (see below), whose sum is σ = 2778572160. Its totient is φ = 213659136.

The previous prime is 803949823. The next prime is 803949841. The reversal of 803949840 is 48949308.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (803949841) 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, 1008322 + ... + 1009118.

It is an arithmetic number, because the mean of its divisors is an integer number (17366076).

Almost surely, 2^803949840 is an apocalyptic number.

803949840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 803949840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389286080).

803949840 is an abundant number, since it is smaller than the sum of its proper divisors (1974622320).

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

803949840 is a wasteful number, since it uses less digits than its factorization.

803949840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 803949840 is about 28354.0092403173. The cubic root of 803949840 is about 929.8430536402.

The spelling of 803949840 in words is "eight hundred three million, nine hundred forty-nine thousand, eight hundred forty".