40259648 has 112 divisors (see below), whose sum is σ = 96780096. Its totient is φ = 16373760.

The previous prime is 40259641. The next prime is 40259657. The reversal of 40259648 is 84695204.

It is not an unprimeable number, because it can be changed into a prime (40259641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485015 + ... + 485097.

It is an arithmetic number, because the mean of its divisors is an integer number (864108).

Almost surely, 2^40259648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40259648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48390048).

40259648 is an abundant number, since it is smaller than the sum of its proper divisors (56520448).

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

40259648 is a wasteful number, since it uses less digits than its factorization.

40259648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 40259648 is about 6345.0490935847. The cubic root of 40259648 is about 342.7335803423.

Subtracting 40259648 from its reverse (84695204), we obtain a square (44435556 = 6666²).

The spelling of 40259648 in words is "forty million, two hundred fifty-nine thousand, six hundred forty-eight".