40644662 has 4 divisors (see below), whose sum is σ = 60966996. Its totient is φ = 20322330.

The previous prime is 40644661. The next prime is 40644677. The reversal of 40644662 is 26644604.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644661) by changing a digit.

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 as a sum of consecutive naturals, namely, 10161164 + ... + 10161167.

It is an arithmetic number, because the mean of its divisors is an integer number (15241749).

Almost surely, 2^40644662 is an apocalyptic number.

40644662 is a deficient number, since it is larger than the sum of its proper divisors (20322334).

40644662 is a wasteful number, since it uses less digits than its factorization.

40644662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20322333.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 40644662 is about 6375.3166195884. The cubic root of 40644662 is about 343.8226675243.

The spelling of 40644662 in words is "forty million, six hundred forty-four thousand, six hundred sixty-two".