11858406 has 32 divisors (see below), whose sum is σ = 27218688. Its totient is φ = 3373920.

The previous prime is 11858387. The next prime is 11858423. The reversal of 11858406 is 60485811.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13476 + ... + 14328.

It is an arithmetic number, because the mean of its divisors is an integer number (850584).

Almost surely, 2^11858406 is an apocalyptic number.

11858406 is an abundant number, since it is smaller than the sum of its proper divisors (15360282).

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

11858406 is a wasteful number, since it uses less digits than its factorization.

11858406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 11858406 is about 3443.6036357281. The cubic root of 11858406 is about 228.0388130292.

It can be divided in two parts, 1185 and 8406, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 11858406 in words is "eleven million, eight hundred fifty-eight thousand, four hundred six".