695640 has 128 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 153600.

The previous prime is 695627. The next prime is 695641. The reversal of 695640 is 46596.

695640 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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 695598 and 695607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (695641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22425 + ... + 22455.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2⁶⁹⁵⁶⁴⁰ is an apocalyptic number.

695640 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 695640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244160).

695640 is an abundant number, since it is smaller than the sum of its proper divisors (1792680).

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

695640 is a wasteful number, since it uses less digits than its factorization.

695640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 695640 is about 834.0503581919. The cubic root of 695640 is about 88.6056703242.

Subtracting from 695640 its sum of digits (30), we obtain a triangular number (695610 = T₁₁₇₉).

It can be divided in two parts, 6956 and 40, that added together give a palindrome (6996).

The spelling of 695640 in words is "six hundred ninety-five thousand, six hundred forty".