3506399 has 4 divisors (see below), whose sum is σ = 3776136. Its totient is φ = 3236664.

The previous prime is 3506387. The next prime is 3506401. The reversal of 3506399 is 9936053.

3506399 = T₂₆₀ + T₂₆₁ + ... + T₃₃₇.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3506399 - 2⁴ = 3506383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3506329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134849 + ... + 134874.

It is an arithmetic number, because the mean of its divisors is an integer number (944034).

Almost surely, 2^3506399 is an apocalyptic number.

3506399 is a deficient number, since it is larger than the sum of its proper divisors (269737).

3506399 is a wasteful number, since it uses less digits than its factorization.

3506399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269736.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 3506399 is about 1872.5381171020. The cubic root of 3506399 is about 151.9219214650.

The spelling of 3506399 in words is "three million, five hundred six thousand, three hundred ninety-nine".