697297440 has 288 divisors, whose sum is σ = 2668256640. Its totient is φ = 152334336.

The previous prime is 697297439. The next prime is 697297441. The reversal of 697297440 is 44792796.

It is an interprime number because it is at equal distance from previous prime (697297439) and next prime (697297441).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 697297440.

It is not an unprimeable number, because it can be changed into a prime (697297441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 540316 + ... + 541604.

It is an arithmetic number, because the mean of its divisors is an integer number (9264780).

Almost surely, 2^697297440 is an apocalyptic number.

697297440 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 697297440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1334128320).

697297440 is an abundant number, since it is smaller than the sum of its proper divisors (1970959200).

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

697297440 is a wasteful number, since it uses less digits than its factorization.

697297440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 697297440 is about 26406.3901357228. The cubic root of 697297440 is about 886.7598547794.

The spelling of 697297440 in words is "six hundred ninety-seven million, two hundred ninety-seven thousand, four hundred forty".