40645670 has 32 divisors (see below), whose sum is σ = 79888032. Its totient is φ = 14798592.

The previous prime is 40645663. The next prime is 40645711. The reversal of 40645670 is 7654604.

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 15 ways as a sum of consecutive naturals, for example, 7349 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (2496501).

Almost surely, 2^40645670 is an apocalyptic number.

40645670 is a deficient number, since it is larger than the sum of its proper divisors (39242362).

40645670 is a wasteful number, since it uses less digits than its factorization.

40645670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 40645670 is about 6375.3956739955. The cubic root of 40645670 is about 343.8255098031.

The spelling of 40645670 in words is "forty million, six hundred forty-five thousand, six hundred seventy".