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40120023 = 3131910139
BaseRepresentation
bin1001100100001…
…0111011010111
32210111022022210
42121002323113
540232320043
63551524503
7665004666
oct231027327
983438283
1040120023
1120712849
1211529733
138409378
145484ddd
1537c7633
hex2642ed7

40120023 has 8 divisors (see below), whose sum is σ = 53539200. Its totient is φ = 26723768.

The previous prime is 40120009. The next prime is 40120033. The reversal of 40120023 is 32002104.

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 40120023 - 25 = 40119991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40119990 and 40120008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120033) 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, 1113 + ... + 9026.

It is an arithmetic number, because the mean of its divisors is an integer number (6692400).

Almost surely, 240120023 is an apocalyptic number.

40120023 is a deficient number, since it is larger than the sum of its proper divisors (13419177).

40120023 is a wasteful number, since it uses less digits than its factorization.

40120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11461.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40120023 is about 6334.0368644333. The cubic root of 40120023 is about 342.3369085166.

Adding to 40120023 its reverse (32002104), we get a palindrome (72122127).

The spelling of 40120023 in words is "forty million, one hundred twenty thousand, twenty-three".

Divisors: 1 3 1319 3957 10139 30417 13373341 40120023