65102040 has 96 divisors (see below), whose sum is σ = 213267600. Its totient is φ = 17222400.

The previous prime is 65102033. The next prime is 65102041. The reversal of 65102040 is 4020156.

It is a happy number.

It is a super-2 number, since 2×65102040² = 8476551224323200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65102041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49390 + ... + 50690.

Almost surely, 2^65102040 is an apocalyptic number.

65102040 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 65102040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106633800).

65102040 is an abundant number, since it is smaller than the sum of its proper divisors (148165560).

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

65102040 is a wasteful number, since it uses less digits than its factorization.

65102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 65102040 is about 8068.5835188092. The cubic root of 65102040 is about 402.2828632199.

Adding to 65102040 its reverse (4020156), we get a palindrome (69122196).

The spelling of 65102040 in words is "sixty-five million, one hundred two thousand, forty".