87824256438 has 32 divisors (see below), whose sum is σ = 178123309056. Its totient is φ = 28862595648.

The previous prime is 87824256433. The next prime is 87824256439. The reversal of 87824256438 is 83465242878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87824256431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139595 + ... + 1214217.

It is an arithmetic number, because the mean of its divisors is an integer number (5566353408).

Almost surely, 2^87824256438 is an apocalyptic number.

87824256438 is an abundant number, since it is smaller than the sum of its proper divisors (90299052618).

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

87824256438 is a wasteful number, since it uses less digits than its factorization.

87824256438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77388.

The product of its digits is 20643840, while the sum is 57.

The spelling of 87824256438 in words is "eighty-seven billion, eight hundred twenty-four million, two hundred fifty-six thousand, four hundred thirty-eight".