690140 has 24 divisors (see below), whose sum is σ = 1581552. Its totient is φ = 250880.

The previous prime is 690139. The next prime is 690143. The reversal of 690140 is 41096.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1349 + ... + 1788.

It is an arithmetic number, because the mean of its divisors is an integer number (65898).

2⁶⁹⁰¹⁴⁰ is an apocalyptic number.

It is an amenable number.

690140 is an abundant number, since it is smaller than the sum of its proper divisors (891412).

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

690140 is a wasteful number, since it uses less digits than its factorization.

690140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 690140 is about 830.7466521148. The cubic root of 690140 is about 88.3715352345.

The spelling of 690140 in words is "six hundred ninety thousand, one hundred forty".