819490040 has 16 divisors (see below), whose sum is σ = 1843852680. Its totient is φ = 327796000.

The previous prime is 819490031. The next prime is 819490051. The reversal of 819490040 is 40094918.

819490040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10243586 + ... + 10243665.

Almost surely, 2^819490040 is an apocalyptic number.

It is an amenable number.

819490040 is an abundant number, since it is smaller than the sum of its proper divisors (1024362640).

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

819490040 is a wasteful number, since it uses less digits than its factorization.

819490040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20487262 (or 20487258 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 819490040 is about 28626.7364538817. The cubic root of 819490040 is about 935.7960905557.

The spelling of 819490040 in words is "eight hundred nineteen million, four hundred ninety thousand, forty".