11880815 has 4 divisors (see below), whose sum is σ = 14256984. Its totient is φ = 9504648.

The previous prime is 11880809. The next prime is 11880821. The reversal of 11880815 is 51808811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51808811 = 23 ⋅2252557.

It is an interprime number because it is at equal distance from previous prime (11880809) and next prime (11880821).

It is a cyclic number.

It is not a de Polignac number, because 11880815 - 2⁶ = 11880751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188077 + ... + 1188086.

It is an arithmetic number, because the mean of its divisors is an integer number (3564246).

Almost surely, 2^11880815 is an apocalyptic number.

11880815 is a deficient number, since it is larger than the sum of its proper divisors (2376169).

11880815 is an equidigital number, since it uses as much as digits as its factorization.

11880815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376168.

The product of its (nonzero) digits is 2560, while the sum is 32.

The square root of 11880815 is about 3446.8558136365. The cubic root of 11880815 is about 228.1823653820.

It can be divided in two parts, 11880 and 815, that multiplied together give a triangular number (9682200 = T₄₄₀₀).

The spelling of 11880815 in words is "eleven million, eight hundred eighty thousand, eight hundred fifteen".