88661538 has 24 divisors (see below), whose sum is σ = 219543168. Its totient is φ = 25331832.

The previous prime is 88661491. The next prime is 88661539. The reversal of 88661538 is 83516688.

It is a junction number, because it is equal to n+sod(n) for n = 88661493 and 88661502.

It is not an unprimeable number, because it can be changed into a prime (88661539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351706 + ... + 351957.

It is an arithmetic number, because the mean of its divisors is an integer number (9147632).

Almost surely, 2^88661538 is an apocalyptic number.

88661538 is an abundant number, since it is smaller than the sum of its proper divisors (130881630).

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

88661538 is a wasteful number, since it uses less digits than its factorization.

88661538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703678 (or 703675 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 88661538 is about 9416.0255946976. The cubic root of 88661538 is about 445.9078180926.

It can be divided in two parts, 8866 and 1538, that added together give a square (10404 = 102²).

The spelling of 88661538 in words is "eighty-eight million, six hundred sixty-one thousand, five hundred thirty-eight".