813589140 has 192 divisors, whose sum is σ = 2861913600. Its totient is φ = 171601920.

The previous prime is 813589123. The next prime is 813589151. The reversal of 813589140 is 41985318.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266020 + ... + 269060.

It is an arithmetic number, because the mean of its divisors is an integer number (14905800).

Almost surely, 2^813589140 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 813589140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430956800).

813589140 is an abundant number, since it is smaller than the sum of its proper divisors (2048324460).

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

813589140 is a wasteful number, since it uses less digits than its factorization.

813589140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 813589140 is about 28523.4840087953. The cubic root of 813589140 is about 933.5445494198.

The spelling of 813589140 in words is "eight hundred thirteen million, five hundred eighty-nine thousand, one hundred forty".