813494016 has 144 divisors (see below), whose sum is σ = 2437020320. Its totient is φ = 270978048.

The previous prime is 813494009. The next prime is 813494023. The reversal of 813494016 is 610494318.

It is an interprime number because it is at equal distance from previous prime (813494009) and next prime (813494023).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559146 + ... + 560598.

Almost surely, 2^813494016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813494016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1218510160).

813494016 is an abundant number, since it is smaller than the sum of its proper divisors (1623526304).

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

813494016 is an frugal number, since it uses more digits than its factorization.

813494016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 813494016 is about 28521.8164919417. The cubic root of 813494016 is about 933.5081649810.

The spelling of 813494016 in words is "eight hundred thirteen million, four hundred ninety-four thousand, sixteen".