4020428 has 6 divisors (see below), whose sum is σ = 7035756. Its totient is φ = 2010212.

The previous prime is 4020409. The next prime is 4020431. The reversal of 4020428 is 8240204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502550 + ... + 502557.

It is an arithmetic number, because the mean of its divisors is an integer number (1172626).

Almost surely, 2^4020428 is an apocalyptic number.

It is an amenable number.

4020428 is a deficient number, since it is larger than the sum of its proper divisors (3015328).

4020428 is a wasteful number, since it uses less digits than its factorization.

4020428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005111 (or 1005109 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4020428 is about 2005.1004962345. The cubic root of 4020428 is about 159.0098750509.

The spelling of 4020428 in words is "four million, twenty thousand, four hundred twenty-eight".