4077978 has 16 divisors (see below), whose sum is σ = 8203680. Its totient is φ = 1351376.

The previous prime is 4077971. The next prime is 4078003. The reversal of 4077978 is 8797704.

It is not an unprimeable number, because it can be changed into a prime (4077971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (512730).

Almost surely, 2^4077978 is an apocalyptic number.

4077978 is an abundant number, since it is smaller than the sum of its proper divisors (4125702).

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

4077978 is a wasteful number, since it uses less digits than its factorization.

4077978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 4077978 is about 2019.4004060612. The cubic root of 4077978 is about 159.7649935354.

It can be divided in two parts, 407 and 7978, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 4077978 in words is "four million, seventy-seven thousand, nine hundred seventy-eight".