697878720 has 448 divisors, whose sum is σ = 3072384000. Its totient is φ = 144875520.

The previous prime is 697878697. The next prime is 697878733. The reversal of 697878720 is 27878796.

It is a tau number, because it is divible by the number of its divisors (448).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 664756 + ... + 665804.

It is an arithmetic number, because the mean of its divisors is an integer number (6858000).

Almost surely, 2^697878720 is an apocalyptic number.

697878720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697878720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1536192000).

697878720 is an abundant number, since it is smaller than the sum of its proper divisors (2374505280).

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

697878720 is a wasteful number, since it uses less digits than its factorization.

697878720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 697878720 is about 26417.3942696853. The cubic root of 697878720 is about 887.0061927952.

The spelling of 697878720 in words is "six hundred ninety-seven million, eight hundred seventy-eight thousand, seven hundred twenty".