40260240 has 240 divisors, whose sum is σ = 148948800. Its totient is φ = 10077696.

The previous prime is 40260239. The next prime is 40260263. The reversal of 40260240 is 4206204.

It is a tau number, because it is divible by the number of its divisors (240).

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

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, 369306 + ... + 369414.

It is an arithmetic number, because the mean of its divisors is an integer number (620620).

Almost surely, 2^40260240 is an apocalyptic number.

40260240 is a gapful number since it is divisible by the number (40) 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 40260240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74474400).

40260240 is an abundant number, since it is smaller than the sum of its proper divisors (108688560).

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

40260240 is a wasteful number, since it uses less digits than its factorization.

40260240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40260240 is about 6345.0957439585. The cubic root of 40260240 is about 342.7352602484.

Adding to 40260240 its reverse (4206204), we get a palindrome (44466444).

The spelling of 40260240 in words is "forty million, two hundred sixty thousand, two hundred forty".