87242638 has 12 divisors (see below), whose sum is σ = 152229672. Its totient is φ = 37389660.

The previous prime is 87242621. The next prime is 87242647. The reversal of 87242638 is 83624278.

It is a super-2 number, since 2×87242638² = 15222555770398088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87242638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445018 + ... + 445213.

It is an arithmetic number, because the mean of its divisors is an integer number (12685806).

Almost surely, 2^87242638 is an apocalyptic number.

87242638 is a deficient number, since it is larger than the sum of its proper divisors (64987034).

87242638 is a wasteful number, since it uses less digits than its factorization.

87242638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890247 (or 890240 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 87242638 is about 9340.3767589964. The cubic root of 87242638 is about 443.5163110494.

The spelling of 87242638 in words is "eighty-seven million, two hundred forty-two thousand, six hundred thirty-eight".