88139520 has 216 divisors, whose sum is σ = 348837216. Its totient is φ = 20127744.

The previous prime is 88139503. The next prime is 88139533. The reversal of 88139520 is 2593188.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80094 + ... + 81186.

Almost surely, 2^88139520 is an apocalyptic number.

88139520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174418608).

88139520 is an abundant number, since it is smaller than the sum of its proper divisors (260697696).

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

88139520 is a wasteful number, since it uses less digits than its factorization.

88139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 88139520 is about 9388.2650154328. The cubic root of 88139520 is about 445.0309619496.

It can be divided in two parts, 881 and 39520, that added together give a square (40401 = 201²).

The spelling of 88139520 in words is "eighty-eight million, one hundred thirty-nine thousand, five hundred twenty".