2978078 has 4 divisors (see below), whose sum is σ = 4467120. Its totient is φ = 1489038.

The previous prime is 2978071. The next prime is 2978089. The reversal of 2978078 is 8708792.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744518 + ... + 744521.

It is an arithmetic number, because the mean of its divisors is an integer number (1116780).

2^2978078 is an apocalyptic number.

2978078 is a deficient number, since it is larger than the sum of its proper divisors (1489042).

2978078 is a wasteful number, since it uses less digits than its factorization.

2978078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489041.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 2978078 is about 1725.7108680193. The cubic root of 2978078 is about 143.8727979060.

The spelling of 2978078 in words is "two million, nine hundred seventy-eight thousand, seventy-eight".