40664598 has 64 divisors (see below), whose sum is σ = 96284160. Its totient is φ = 11328768.

The previous prime is 40664593. The next prime is 40664599. The reversal of 40664598 is 89546604.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33490 + ... + 34682.

It is an arithmetic number, because the mean of its divisors is an integer number (1504440).

Almost surely, 2^40664598 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40664598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48142080).

40664598 is an abundant number, since it is smaller than the sum of its proper divisors (55619562).

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

40664598 is a wasteful number, since it uses less digits than its factorization.

40664598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253.

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

The square root of 40664598 is about 6376.8799580986. The cubic root of 40664598 is about 343.8788727591.

The spelling of 40664598 in words is "forty million, six hundred sixty-four thousand, five hundred ninety-eight".