581142740 has 48 divisors (see below), whose sum is σ = 1326097920. Its totient is φ = 213114240.

The previous prime is 581142713. The next prime is 581142767. The reversal of 581142740 is 47241185.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (581142713) and next prime (581142767).

It is a junction number, because it is equal to n+sod(n) for n = 581142697 and 581142706.

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, 12887 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (27627040).

Almost surely, 2^581142740 is an apocalyptic number.

It is an amenable number.

581142740 is an abundant number, since it is smaller than the sum of its proper divisors (744955180).

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

581142740 is a wasteful number, since it uses less digits than its factorization.

581142740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49392 (or 49390 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 581142740 is about 24106.9023310752. The cubic root of 581142740 is about 834.5024298446.

The spelling of 581142740 in words is "five hundred eighty-one million, one hundred forty-two thousand, seven hundred forty".