65938840 has 32 divisors (see below), whose sum is σ = 161850960. Its totient is φ = 23977600.

The previous prime is 65938819. The next prime is 65938867. The reversal of 65938840 is 4883956.

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, 74491 + ... + 75370.

Almost surely, 2^65938840 is an apocalyptic number.

It is an amenable number.

65938840 is an abundant number, since it is smaller than the sum of its proper divisors (95912120).

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

65938840 is a wasteful number, since it uses less digits than its factorization.

65938840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149883 (or 149879 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 65938840 is about 8120.2733944123. The cubic root of 65938840 is about 403.9991340700. Note that the first 3 decimals are identical.

The spelling of 65938840 in words is "sixty-five million, nine hundred thirty-eight thousand, eight hundred forty".