88387821 has 16 divisors (see below), whose sum is σ = 131260800. Its totient is φ = 58783104.

The previous prime is 88387813. The next prime is 88387823. The reversal of 88387821 is 12878388.

It is a happy number.

It is not a de Polignac number, because 88387821 - 2³ = 88387813 is a prime.

It is a super-2 number, since 2×88387821² = 15624813802256082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88387823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8125 + ... + 15581.

It is an arithmetic number, because the mean of its divisors is an integer number (8203800).

Almost surely, 2^88387821 is an apocalyptic number.

It is an amenable number.

88387821 is a deficient number, since it is larger than the sum of its proper divisors (42872979).

88387821 is a wasteful number, since it uses less digits than its factorization.

88387821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7905 (or 7899 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 88387821 is about 9401.4797239584. The cubic root of 88387821 is about 445.4484743547.

The spelling of 88387821 in words is "eighty-eight million, three hundred eighty-seven thousand, eight hundred twenty-one".