797823540 has 96 divisors (see below), whose sum is σ = 2590076160. Its totient is φ = 203499648.

The previous prime is 797823527. The next prime is 797823557. The reversal of 797823540 is 45328797.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19699 + ... + 44538.

It is an arithmetic number, because the mean of its divisors is an integer number (26979960).

Almost surely, 2^797823540 is an apocalyptic number.

It is an amenable number.

797823540 is an abundant number, since it is smaller than the sum of its proper divisors (1792252620).

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

797823540 is a wasteful number, since it uses less digits than its factorization.

797823540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64278 (or 64270 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 797823540 is about 28245.7703028259. The cubic root of 797823540 is about 927.4751494227.

The spelling of 797823540 in words is "seven hundred ninety-seven million, eight hundred twenty-three thousand, five hundred forty".