2158078 has 8 divisors (see below), whose sum is σ = 3486168. Its totient is φ = 996024.

The previous prime is 2158073. The next prime is 2158081. The reversal of 2158078 is 8708512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158073) 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, 41476 + ... + 41527.

It is an arithmetic number, because the mean of its divisors is an integer number (435771).

2^2158078 is an apocalyptic number.

2158078 is a deficient number, since it is larger than the sum of its proper divisors (1328090).

2158078 is a wasteful number, since it uses less digits than its factorization.

2158078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83018.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2158078 is about 1469.0398224691. The cubic root of 2158078 is about 129.2277290661.

The spelling of 2158078 in words is "two million, one hundred fifty-eight thousand, seventy-eight".