39866004 has 18 divisors (see below), whose sum is σ = 100772490. Its totient is φ = 13288656.

The previous prime is 39865999. The next prime is 39866023. The reversal of 39866004 is 40066893.

It can be written as a sum of positive squares in only one way, i.e., 32832900 + 7033104 = 5730^2 + 2652^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1107389 = 39866004 / (3 + 9 + 8 + 6 + 6 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 39866004.

It is a congruent number.

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, 553659 + ... + 553730.

Almost surely, 2^39866004 is an apocalyptic number.

It is an amenable number.

39866004 is an abundant number, since it is smaller than the sum of its proper divisors (60906486).

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

39866004 is a wasteful number, since it uses less digits than its factorization.

39866004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107399 (or 1107394 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 39866004 is about 6313.9531198766. The cubic root of 39866004 is about 341.6128788882.

The spelling of 39866004 in words is "thirty-nine million, eight hundred sixty-six thousand, four".