4087990 has 32 divisors (see below), whose sum is σ = 7892640. Its totient is φ = 1519104.

The previous prime is 4087969. The next prime is 4087991. The reversal of 4087990 is 997804.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4087991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23544 + ... + 23716.

It is an arithmetic number, because the mean of its divisors is an integer number (246645).

Almost surely, 2^4087990 is an apocalyptic number.

4087990 is a deficient number, since it is larger than the sum of its proper divisors (3804650).

4087990 is a wasteful number, since it uses less digits than its factorization.

4087990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 4087990 is about 2021.8778400289. The cubic root of 4087990 is about 159.8956350646.

The spelling of 4087990 in words is "four million, eighty-seven thousand, nine hundred ninety".