820117464 has 32 divisors (see below), whose sum is σ = 2085048000. Its totient is φ = 268738592.

The previous prime is 820117447. The next prime is 820117537. The reversal of 820117464 is 464711028.

It is a congruent number.

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, 288174 + ... + 291005.

It is an arithmetic number, because the mean of its divisors is an integer number (65157750).

Almost surely, 2^820117464 is an apocalyptic number.

It is an amenable number.

820117464 is an abundant number, since it is smaller than the sum of its proper divisors (1264930536).

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

820117464 is a wasteful number, since it uses less digits than its factorization.

820117464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579247 (or 579243 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 820117464 is about 28637.6930635133. The cubic root of 820117464 is about 936.0348533300.

The spelling of 820117464 in words is "eight hundred twenty million, one hundred seventeen thousand, four hundred sixty-four".