4006436 has 18 divisors (see below), whose sum is σ = 8156358. Its totient is φ = 1716960.

The previous prime is 4006423. The next prime is 4006451. The reversal of 4006436 is 6346004.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 164836 = 1960^2 + 406^2 .

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10025 + ... + 10416.

It is an arithmetic number, because the mean of its divisors is an integer number (453131).

Almost surely, 2^4006436 is an apocalyptic number.

It is an amenable number.

4006436 is an abundant number, since it is smaller than the sum of its proper divisors (4149922).

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

4006436 is a wasteful number, since it uses less digits than its factorization.

4006436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20459 (or 20450 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 4006436 is about 2001.6083532999. The cubic root of 4006436 is about 158.8251971852.

The spelling of 4006436 in words is "four million, six thousand, four hundred thirty-six".