40641970 has 8 divisors (see below), whose sum is σ = 73155564. Its totient is φ = 16256784.

The previous prime is 40641967. The next prime is 40641977. The reversal of 40641970 is 7914604.

It can be written as a sum of positive squares in 2 ways, for example, as 40233649 + 408321 = 6343^2 + 639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40641977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032089 + ... + 2032108.

Almost surely, 2^40641970 is an apocalyptic number.

40641970 is a deficient number, since it is larger than the sum of its proper divisors (32513594).

40641970 is a wasteful number, since it uses less digits than its factorization.

40641970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064204.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 40641970 is about 6375.1054893233. The cubic root of 40641970 is about 343.8150766049.

The spelling of 40641970 in words is "forty million, six hundred forty-one thousand, nine hundred seventy".