87723818 has 48 divisors (see below), whose sum is σ = 169389864. Its totient is φ = 33747840.

The previous prime is 87723803. The next prime is 87723833. The reversal of 87723818 is 81832778.

It is an interprime number because it is at equal distance from previous prime (87723803) and next prime (87723833).

It can be written as a sum of positive squares in 4 ways, for example, as 48121969 + 39601849 = 6937^2 + 6293^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46208 + ... + 48068.

Almost surely, 2^87723818 is an apocalyptic number.

87723818 is a deficient number, since it is larger than the sum of its proper divisors (81666046).

87723818 is a wasteful number, since it uses less digits than its factorization.

87723818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1920 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 87723818 is about 9366.0994015652. The cubic root of 87723818 is about 444.3302098123.

The spelling of 87723818 in words is "eighty-seven million, seven hundred twenty-three thousand, eight hundred eighteen".