65693240 has 32 divisors (see below), whose sum is σ = 149688000. Its totient is φ = 25943424.

The previous prime is 65693231. The next prime is 65693249. The reversal of 65693240 is 4239656.

It is an interprime number because it is at equal distance from previous prime (65693231) and next prime (65693249).

It is a self number, because there is not a number n which added to its sum of digits gives 65693240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65693249) 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, 7235 + ... + 13554.

It is an arithmetic number, because the mean of its divisors is an integer number (4677750).

Almost surely, 2^65693240 is an apocalyptic number.

It is an amenable number.

65693240 is an abundant number, since it is smaller than the sum of its proper divisors (83994760).

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

65693240 is a wasteful number, since it uses less digits than its factorization.

65693240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879 (or 20875 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 65693240 is about 8105.1366428950. The cubic root of 65693240 is about 403.4969230684.

The spelling of 65693240 in words is "sixty-five million, six hundred ninety-three thousand, two hundred forty".