4099428 has 36 divisors (see below), whose sum is σ = 10815168. Its totient is φ = 1306800.

The previous prime is 4099369. The next prime is 4099441. The reversal of 4099428 is 8249904.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4099392 and 4099401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1648 + ... + 3303.

Almost surely, 2^4099428 is an apocalyptic number.

It is an amenable number.

4099428 is an abundant number, since it is smaller than the sum of its proper divisors (6715740).

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

4099428 is a wasteful number, since it uses less digits than its factorization.

4099428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984 (or 4979 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 4099428 is about 2024.7044228726. The cubic root of 4099428 is about 160.0446229705.

The spelling of 4099428 in words is "four million, ninety-nine thousand, four hundred twenty-eight".