817978462 has 96 divisors (see below), whose sum is σ = 1596948480. Its totient is φ = 311895360.

The previous prime is 817978439. The next prime is 817978471. The reversal of 817978462 is 264879718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2135523 + ... + 2135905.

It is an arithmetic number, because the mean of its divisors is an integer number (16634880).

Almost surely, 2^817978462 is an apocalyptic number.

817978462 is a deficient number, since it is larger than the sum of its proper divisors (778970018).

817978462 is a wasteful number, since it uses less digits than its factorization.

817978462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 479 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 817978462 is about 28600.3227604165. The cubic root of 817978462 is about 935.2203669056.

The spelling of 817978462 in words is "eight hundred seventeen million, nine hundred seventy-eight thousand, four hundred sixty-two".