65172340 has 24 divisors (see below), whose sum is σ = 142813440. Its totient is φ = 24935328.

The previous prime is 65172293. The next prime is 65172361. The reversal of 65172340 is 4327156.

It is a junction number, because it is equal to n+sod(n) for n = 65172299 and 65172308.

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, 70380 + ... + 71299.

It is an arithmetic number, because the mean of its divisors is an integer number (5950560).

Almost surely, 2^65172340 is an apocalyptic number.

It is an amenable number.

65172340 is an abundant number, since it is smaller than the sum of its proper divisors (77641100).

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

65172340 is a wasteful number, since it uses less digits than its factorization.

65172340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141711 (or 141709 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 65172340 is about 8072.9387462064. The cubic root of 65172340 is about 402.4276119451.

Adding to 65172340 its reverse (4327156), we get a palindrome (69499496).

The spelling of 65172340 in words is "sixty-five million, one hundred seventy-two thousand, three hundred forty".