87881246 has 4 divisors (see below), whose sum is σ = 131821872. Its totient is φ = 43940622.

The previous prime is 87881237. The next prime is 87881257. The reversal of 87881246 is 64218878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64218878 = 2 ⋅32109439.

It is a super-2 number, since 2×87881246² = 15446226797025032, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87881197 and 87881206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21970310 + ... + 21970313.

It is an arithmetic number, because the mean of its divisors is an integer number (32955468).

Almost surely, 2^87881246 is an apocalyptic number.

87881246 is a deficient number, since it is larger than the sum of its proper divisors (43940626).

87881246 is a wasteful number, since it uses less digits than its factorization.

87881246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43940625.

The product of its digits is 172032, while the sum is 44.

The square root of 87881246 is about 9374.4997733212. The cubic root of 87881246 is about 444.5958473391.

The spelling of 87881246 in words is "eighty-seven million, eight hundred eighty-one thousand, two hundred forty-six".