4155890 has 16 divisors (see below), whose sum is σ = 7584408. Its totient is φ = 1639296.

The previous prime is 4155887. The next prime is 4155911. The reversal of 4155890 is 985514.

It can be written as a sum of positive squares in 4 ways, for example, as 2660161 + 1495729 = 1631^2 + 1223^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2117 + ... + 3576.

Almost surely, 2^4155890 is an apocalyptic number.

4155890 is a deficient number, since it is larger than the sum of its proper divisors (3428518).

4155890 is a wasteful number, since it uses less digits than its factorization.

4155890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 4155890 is about 2038.6000098107. The cubic root of 4155890 is about 160.7760475614.

The spelling of 4155890 in words is "four million, one hundred fifty-five thousand, eight hundred ninety".