4015990 has 24 divisors (see below), whose sum is σ = 7948080. Its totient is φ = 1459920.

The previous prime is 4015987. The next prime is 4015993. The reversal of 4015990 is 995104.

4015990 = T₈₄₉ + T₈₅₀ + ... + T₈₅₉.

It is an interprime number because it is at equal distance from previous prime (4015987) and next prime (4015993).

It is a super-2 number, since 2×4015990² = 32256351360200, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 450 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (331170).

Almost surely, 2^4015990 is an apocalyptic number.

4015990 is a deficient number, since it is larger than the sum of its proper divisors (3932090).

4015990 is a wasteful number, since it uses less digits than its factorization.

4015990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 4015990 is about 2003.9935129636. The cubic root of 4015990 is about 158.9513451593.

It can be divided in two parts, 4015 and 990, that added together give a palindrome (5005).

The spelling of 4015990 in words is "four million, fifteen thousand, nine hundred ninety".