697724928 has 156 divisors (see below), whose sum is σ = 2093029848. Its totient is φ = 232243200.

The previous prime is 697724927. The next prime is 697724933. The reversal of 697724928 is 829427796.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697724927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 994978 + ... + 995678.

It is an arithmetic number, because the mean of its divisors is an integer number (13416858).

Almost surely, 2^697724928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697724928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046514924).

697724928 is an abundant number, since it is smaller than the sum of its proper divisors (1395304920).

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

697724928 is an frugal number, since it uses more digits than its factorization.

697724928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 706 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 697724928 is about 26414.4832998868. The cubic root of 697724928 is about 886.9410312926.

The spelling of 697724928 in words is "six hundred ninety-seven million, seven hundred twenty-four thousand, nine hundred twenty-eight".