811387652 has 24 divisors (see below), whose sum is σ = 1521715776. Its totient is φ = 377565408.

The previous prime is 811387639. The next prime is 811387667. The reversal of 811387652 is 256783118.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115778 + ... + 122585.

It is an arithmetic number, because the mean of its divisors is an integer number (63404824).

Almost surely, 2^811387652 is an apocalyptic number.

It is an amenable number.

811387652 is a deficient number, since it is larger than the sum of its proper divisors (710328124).

811387652 is a wasteful number, since it uses less digits than its factorization.

811387652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238427 (or 238425 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 811387652 is about 28484.8670700778. The cubic root of 811387652 is about 932.7017638247.

The spelling of 811387652 in words is "eight hundred eleven million, three hundred eighty-seven thousand, six hundred fifty-two".