101791540 has 24 divisors (see below), whose sum is σ = 214889472. Its totient is φ = 40501920.

The previous prime is 101791499. The next prime is 101791577. The reversal of 101791540 is 45197101.

It is a junction number, because it is equal to n+sod(n) for n = 101791499 and 101791508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9504 + ... + 17143.

It is an arithmetic number, because the mean of its divisors is an integer number (8953728).

Almost surely, 2^101791540 is an apocalyptic number.

101791540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101791540 is an abundant number, since it is smaller than the sum of its proper divisors (113097932).

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

101791540 is a wasteful number, since it uses less digits than its factorization.

101791540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26847 (or 26845 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 101791540 is about 10089.1793521574. The cubic root of 101791540 is about 466.9143571733.

The spelling of 101791540 in words is "one hundred one million, seven hundred ninety-one thousand, five hundred forty".