40661600 has 144 divisors (see below), whose sum is σ = 116430048. Its totient is φ = 13578240.

The previous prime is 40661591. The next prime is 40661623. The reversal of 40661600 is 616604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296732 + ... + 296868.

It is an arithmetic number, because the mean of its divisors is an integer number (808542).

Almost surely, 2^40661600 is an apocalyptic number.

40661600 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 40661600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58215024).

40661600 is an abundant number, since it is smaller than the sum of its proper divisors (75768448).

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

40661600 is a wasteful number, since it uses less digits than its factorization.

40661600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40661600 is about 6376.6448858314. The cubic root of 40661600 is about 343.8704217211.

The spelling of 40661600 in words is "forty million, six hundred sixty-one thousand, six hundred".