88239421 has 8 divisors (see below), whose sum is σ = 90567288. Its totient is φ = 85920000.

The previous prime is 88239409. The next prime is 88239427. The reversal of 88239421 is 12493288.

It can be written as a sum of positive squares in 4 ways, for example, as 21996100 + 66243321 = 4690^2 + 8139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 88239421 - 2¹⁵ = 88206653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88239427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22851 + ... + 26431.

It is an arithmetic number, because the mean of its divisors is an integer number (11320911).

Almost surely, 2^88239421 is an apocalyptic number.

It is an amenable number.

88239421 is a deficient number, since it is larger than the sum of its proper divisors (2327867).

88239421 is a wasteful number, since it uses less digits than its factorization.

88239421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its digits is 27648, while the sum is 37.

The square root of 88239421 is about 9393.5840337967. The cubic root of 88239421 is about 445.1990373353.

The spelling of 88239421 in words is "eighty-eight million, two hundred thirty-nine thousand, four hundred twenty-one".