88240639 has 4 divisors (see below), whose sum is σ = 88266024. Its totient is φ = 88215256.

The previous prime is 88240619. The next prime is 88240729. The reversal of 88240639 is 93604288.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 88240639 - 2²⁵ = 54686207 is a prime.

It is a super-2 number, since 2×88240639² = 15572820742256642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88240619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6457 + ... + 14770.

It is an arithmetic number, because the mean of its divisors is an integer number (22066506).

Almost surely, 2^88240639 is an apocalyptic number.

88240639 is a deficient number, since it is larger than the sum of its proper divisors (25385).

88240639 is a wasteful number, since it uses less digits than its factorization.

88240639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25384.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 88240639 is about 9393.6488650577. The cubic root of 88240639 is about 445.2010857392.

The spelling of 88240639 in words is "eighty-eight million, two hundred forty thousand, six hundred thirty-nine".