40397670 has 64 divisors (see below), whose sum is σ = 108527040. Its totient is φ = 10692864.

The previous prime is 40397657. The next prime is 40397701. The reversal of 40397670 is 7679304.

40397670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41914 + ... + 42866.

It is an arithmetic number, because the mean of its divisors is an integer number (1695735).

Almost surely, 2^40397670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40397670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54263520).

40397670 is an abundant number, since it is smaller than the sum of its proper divisors (68129370).

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

40397670 is a wasteful number, since it uses less digits than its factorization.

40397670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 40397670 is about 6355.9161416746. The cubic root of 40397670 is about 343.1247976946.

The spelling of 40397670 in words is "forty million, three hundred ninety-seven thousand, six hundred seventy".