690378 has 32 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 207168.

The previous prime is 690377. The next prime is 690397. The reversal of 690378 is 873096.

It is a happy number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (690377) 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, 4051 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2⁶⁹⁰³⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762048).

690378 is an abundant number, since it is smaller than the sum of its proper divisors (833718).

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

690378 is a wasteful number, since it uses less digits than its factorization.

690378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 690378 is about 830.8898844011. The cubic root of 690378 is about 88.3816925978.

The spelling of 690378 in words is "six hundred ninety thousand, three hundred seventy-eight".