40649568 has 48 divisors (see below), whose sum is σ = 107767296. Its totient is φ = 13415040.

The previous prime is 40649551. The next prime is 40649591. The reversal of 40649568 is 86594604.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7833 + ... + 11943.

It is an arithmetic number, because the mean of its divisors is an integer number (2245152).

Almost surely, 2^40649568 is an apocalyptic number.

40649568 is a gapful number since it is divisible by the number (48) 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 40649568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53883648).

40649568 is an abundant number, since it is smaller than the sum of its proper divisors (67117728).

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

40649568 is a wasteful number, since it uses less digits than its factorization.

40649568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227 (or 4219 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 40649568 is about 6375.7013731824. The cubic root of 40649568 is about 343.8365006335.

The spelling of 40649568 in words is "forty million, six hundred forty-nine thousand, five hundred sixty-eight".