693327978 has 128 divisors (see below), whose sum is σ = 1832025600. Its totient is φ = 190232064.

The previous prime is 693327977. The next prime is 693327997. The reversal of 693327978 is 879723396.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (693327977) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1244476 + ... + 1245032.

It is an arithmetic number, because the mean of its divisors is an integer number (14312700).

Almost surely, 2^693327978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 693327978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916012800).

693327978 is an abundant number, since it is smaller than the sum of its proper divisors (1138697622).

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

693327978 is a wasteful number, since it uses less digits than its factorization.

693327978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 695 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 693327978 is about 26331.1218522873. The cubic root of 693327978 is about 885.0739840476.

The spelling of 693327978 in words is "six hundred ninety-three million, three hundred twenty-seven thousand, nine hundred seventy-eight".