2190428 has 24 divisors (see below), whose sum is σ = 4142880. Its totient is φ = 1010240.

The previous prime is 2190427. The next prime is 2190439. The reversal of 2190428 is 8240912.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 2190397 and 2190406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2258 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (172620).

2^2190428 is an apocalyptic number.

It is an amenable number.

2190428 is a deficient number, since it is larger than the sum of its proper divisors (1952452).

2190428 is a wasteful number, since it uses less digits than its factorization.

2190428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2190428 is about 1480.0094594292. The cubic root of 2190428 is about 129.8702452867.

Multiplying 2190428 by its sum of digits (26), we get a triangular number (56951128 = T₁₀₆₇₂).

The spelling of 2190428 in words is "two million, one hundred ninety thousand, four hundred twenty-eight".