101230640 has 80 divisors (see below), whose sum is σ = 275607360. Its totient is φ = 33853440.

The previous prime is 101230639. The next prime is 101230663. The reversal of 101230640 is 46032101.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20756 + ... + 25164.

It is an arithmetic number, because the mean of its divisors is an integer number (3445092).

Almost surely, 2^101230640 is an apocalyptic number.

101230640 is a gapful number since it is divisible by the number (10) 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 101230640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137803680).

101230640 is an abundant number, since it is smaller than the sum of its proper divisors (174376720).

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

101230640 is a wasteful number, since it uses less digits than its factorization.

101230640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470 (or 4464 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 101230640 is about 10061.3438466241. The cubic root of 101230640 is about 466.0551673223.

Adding to 101230640 its reverse (46032101), we get a palindrome (147262741).

The spelling of 101230640 in words is "one hundred one million, two hundred thirty thousand, six hundred forty".