613091808 has 384 divisors, whose sum is σ = 2220825600. Its totient is φ = 160579584.

The previous prime is 613091803. The next prime is 613091827. The reversal of 613091808 is 808190316.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613091803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6888628 + ... + 6888716.

It is an arithmetic number, because the mean of its divisors is an integer number (5783400).

Almost surely, 2^613091808 is an apocalyptic number.

613091808 is a gapful number since it is divisible by the number (68) 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 613091808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110412800).

613091808 is an abundant number, since it is smaller than the sum of its proper divisors (1607733792).

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

613091808 is a wasteful number, since it uses less digits than its factorization.

613091808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 613091808 is about 24760.6907819633. The cubic root of 613091808 is about 849.5230579241.

The spelling of 613091808 in words is "six hundred thirteen million, ninety-one thousand, eight hundred eight".