4020578 has 4 divisors (see below), whose sum is σ = 6030870. Its totient is φ = 2010288.

The previous prime is 4020563. The next prime is 4020587. The reversal of 4020578 is 8750204.

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

It can be written as a sum of positive squares in only one way, i.e., 3736489 + 284089 = 1933^2 + 533^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005143 + ... + 1005146.

Almost surely, 2^4020578 is an apocalyptic number.

4020578 is a deficient number, since it is larger than the sum of its proper divisors (2010292).

4020578 is a wasteful number, since it uses less digits than its factorization.

4020578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010291.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 4020578 is about 2005.1379004946. The cubic root of 4020578 is about 159.0118525505.

The spelling of 4020578 in words is "four million, twenty thousand, five hundred seventy-eight".