65993240 has 16 divisors (see below), whose sum is σ = 148484880. Its totient is φ = 26397280.

The previous prime is 65993219. The next prime is 65993281. The reversal of 65993240 is 4239956.

It is a junction number, because it is equal to n+sod(n) for n = 65993194 and 65993203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824876 + ... + 824955.

It is an arithmetic number, because the mean of its divisors is an integer number (9280305).

Almost surely, 2^65993240 is an apocalyptic number.

It is an amenable number.

65993240 is an abundant number, since it is smaller than the sum of its proper divisors (82491640).

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

65993240 is a wasteful number, since it uses less digits than its factorization.

65993240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649842 (or 1649838 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 65993240 is about 8123.6223447425. The cubic root of 65993240 is about 404.1102042262.

It can be divided in two parts, 6 and 5993240, that multiplied together give a triangular number (35959440 = T₈₄₈₀).

The spelling of 65993240 in words is "sixty-five million, nine hundred ninety-three thousand, two hundred forty".