65267440 has 40 divisors (see below), whose sum is σ = 173426400. Its totient is φ = 22377216.

The previous prime is 65267407. The next prime is 65267473. The reversal of 65267440 is 4476256.

It is an interprime number because it is at equal distance from previous prime (65267407) and next prime (65267473).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 65267396 and 65267405.

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, 57715 + ... + 58834.

It is an arithmetic number, because the mean of its divisors is an integer number (4335660).

Almost surely, 2^65267440 is an apocalyptic number.

It is an amenable number.

65267440 is an abundant number, since it is smaller than the sum of its proper divisors (108158960).

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

65267440 is a wasteful number, since it uses less digits than its factorization.

65267440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116569 (or 116563 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 65267440 is about 8078.8266474780. The cubic root of 65267440 is about 402.6232586766.

The spelling of 65267440 in words is "sixty-five million, two hundred sixty-seven thousand, four hundred forty".