378690 has 32 divisors (see below), whose sum is σ = 979776. Its totient is φ = 93120.

The previous prime is 378683. The next prime is 378691. The reversal of 378690 is 96873.

It is a happy number.

It is a super-2 number, since 2×378690² = 286812232200, which contains 22 as substring.

It is a Curzon number.

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 378690.

It is not an unprimeable number, because it can be changed into a prime (378691) 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, 96 + ... + 875.

It is an arithmetic number, because the mean of its divisors is an integer number (30618).

2³⁷⁸⁶⁹⁰ is an apocalyptic number.

378690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 378690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489888).

378690 is an abundant number, since it is smaller than the sum of its proper divisors (601086).

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

378690 is a wasteful number, since it uses less digits than its factorization.

378690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

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

The square root of 378690 is about 615.3779326560. The cubic root of 378690 is about 72.3482358435.

The spelling of 378690 in words is "three hundred seventy-eight thousand, six hundred ninety".