65361240 has 192 divisors, whose sum is σ = 249687360. Its totient is φ = 14515200.

The previous prime is 65361229. The next prime is 65361269. The reversal of 65361240 is 4216356.

65361240 is a `hidden beast` number, since 6 + 5 + 3 + 612 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92890 + ... + 93590.

It is an arithmetic number, because the mean of its divisors is an integer number (1300455).

Almost surely, 2^65361240 is an apocalyptic number.

65361240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65361240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124843680).

65361240 is an abundant number, since it is smaller than the sum of its proper divisors (184326120).

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

65361240 is a wasteful number, since it uses less digits than its factorization.

65361240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 65361240 is about 8084.6298616572. The cubic root of 65361240 is about 402.8160448708.

Adding to 65361240 its reverse (4216356), we get a palindrome (69577596).

It can be divided in two parts, 6536 and 1240, that added together give a 5-th power (7776 = 6⁵).

The spelling of 65361240 in words is "sixty-five million, three hundred sixty-one thousand, two hundred forty".