697578 has 32 divisors (see below), whose sum is σ = 1689984. Its totient is φ = 187392.

The previous prime is 697553. The next prime is 697579. The reversal of 697578 is 875796.

697578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697578.

It is not an unprimeable number, because it can be changed into a prime (697579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226 + ... + 1202.

It is an arithmetic number, because the mean of its divisors is an integer number (52812).

2⁶⁹⁷⁵⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844992).

697578 is an abundant number, since it is smaller than the sum of its proper divisors (992406).

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

697578 is a wasteful number, since it uses less digits than its factorization.

697578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its digits is 105840, while the sum is 42.

The square root of 697578 is about 835.2113504976. The cubic root of 697578 is about 88.6878769115.

It can be divided in two parts, 697 and 578, that added together give a triangular number (1275 = T₅₀).

The spelling of 697578 in words is "six hundred ninety-seven thousand, five hundred seventy-eight".