2078378 has 8 divisors (see below), whose sum is σ = 3148740. Its totient is φ = 1028800.

The previous prime is 2078371. The next prime is 2078389. The reversal of 2078378 is 8738702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1570009 + 508369 = 1253^2 + 713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2078378² = 8639310221768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2078371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4943 + ... + 5346.

2^2078378 is an apocalyptic number.

2078378 is a deficient number, since it is larger than the sum of its proper divisors (1070362).

2078378 is a wasteful number, since it uses less digits than its factorization.

2078378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10392.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 2078378 is about 1441.6580731921. The cubic root of 2078378 is about 127.6168965089.

The spelling of 2078378 in words is "two million, seventy-eight thousand, three hundred seventy-eight".