812645248 has 32 divisors (see below), whose sum is σ = 1620729000. Its totient is φ = 405874176.

The previous prime is 812645179. The next prime is 812645287. The reversal of 812645248 is 842546218.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 812645248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133863 + ... + 139801.

Almost surely, 2^812645248 is an apocalyptic number.

It is an amenable number.

812645248 is a deficient number, since it is larger than the sum of its proper divisors (808083752).

812645248 is a wasteful number, since it uses less digits than its factorization.

812645248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022 (or 7010 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 812645248 is about 28506.9333320861. The cubic root of 812645248 is about 933.1833899713.

The spelling of 812645248 in words is "eight hundred twelve million, six hundred forty-five thousand, two hundred forty-eight".