64260240 has 160 divisors (see below), whose sum is σ = 220378752. Its totient is φ = 15360000.

The previous prime is 64260239. The next prime is 64260253. The reversal of 64260240 is 4206246.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 64260240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266520 + ... + 266760.

Almost surely, 2^64260240 is an apocalyptic number.

64260240 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 64260240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110189376).

64260240 is an abundant number, since it is smaller than the sum of its proper divisors (156118512).

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

64260240 is a wasteful number, since it uses less digits than its factorization.

64260240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 64260240 is about 8016.2484991422. The cubic root of 64260240 is about 400.5414334605.

Adding to 64260240 its reverse (4206246), we get a palindrome (68466486).

The spelling of 64260240 in words is "sixty-four million, two hundred sixty thousand, two hundred forty".