11958870 has 128 divisors (see below), whose sum is σ = 37158912. Its totient is φ = 2390400.

The previous prime is 11958857. The next prime is 11958893. The reversal of 11958870 is 7885911.

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 63 ways as a sum of consecutive naturals, for example, 71527 + ... + 71693.

It is an arithmetic number, because the mean of its divisors is an integer number (290304).

Almost surely, 2^11958870 is an apocalyptic number.

11958870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11958870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18579456).

11958870 is an abundant number, since it is smaller than the sum of its proper divisors (25200042).

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

11958870 is a wasteful number, since it uses less digits than its factorization.

11958870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 11958870 is about 3458.1599153307. The cubic root of 11958870 is about 228.6809818954.

The spelling of 11958870 in words is "eleven million, nine hundred fifty-eight thousand, eight hundred seventy".