11420428 has 6 divisors (see below), whose sum is σ = 19985756. Its totient is φ = 5710212.

The previous prime is 11420417. The next prime is 11420429. The reversal of 11420428 is 82402411.

It is a junction number, because it is equal to n+sod(n) for n = 11420399 and 11420408.

It is not an unprimeable number, because it can be changed into a prime (11420429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427550 + ... + 1427557.

Almost surely, 2^11420428 is an apocalyptic number.

It is an amenable number.

11420428 is a deficient number, since it is larger than the sum of its proper divisors (8565328).

11420428 is a wasteful number, since it uses less digits than its factorization.

11420428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855111 (or 2855109 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 11420428 is about 3379.4123749551. The cubic root of 11420428 is about 225.1960628479.

Adding to 11420428 its reverse (82402411), we get a palindrome (93822839).

The spelling of 11420428 in words is "eleven million, four hundred twenty thousand, four hundred twenty-eight".