4002090 has 16 divisors (see below), whose sum is σ = 9605088. Its totient is φ = 1067216.

The previous prime is 4002077. The next prime is 4002101. The reversal of 4002090 is 902004.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 66672 + ... + 66731.

It is an arithmetic number, because the mean of its divisors is an integer number (600318).

Almost surely, 2^4002090 is an apocalyptic number.

4002090 is an abundant number, since it is smaller than the sum of its proper divisors (5602998).

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

4002090 is a wasteful number, since it uses less digits than its factorization.

4002090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133413.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 4002090 is about 2000.5224317663. The cubic root of 4002090 is about 158.7677476180.

Adding to 4002090 its reverse (902004), we get a palindrome (4904094).

The spelling of 4002090 in words is "four million, two thousand, ninety".