3865004 has 48 divisors (see below), whose sum is σ = 8255520. Its totient is φ = 1559040.

The previous prime is 3864979. The next prime is 3865007. The reversal of 3865004 is 4005683.

3865004 = T₂₇₅ + T₂₇₆ + ... + T₃₅₂.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (3865007) 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, 16472 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (171990).

Almost surely, 2^3865004 is an apocalyptic number.

It is an amenable number.

3865004 is an abundant number, since it is smaller than the sum of its proper divisors (4390516).

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

3865004 is a wasteful number, since it uses less digits than its factorization.

3865004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3865004 is about 1965.9613424480. The cubic root of 3865004 is about 156.9338572184.

The spelling of 3865004 in words is "three million, eight hundred sixty-five thousand, four".