40398670 has 32 divisors (see below), whose sum is σ = 79057440. Its totient is φ = 14774400.

The previous prime is 40398661. The next prime is 40398703. The reversal of 40398670 is 7689304.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12745 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (2470545).

Almost surely, 2^40398670 is an apocalyptic number.

40398670 is a deficient number, since it is larger than the sum of its proper divisors (38658770).

40398670 is a wasteful number, since it uses less digits than its factorization.

40398670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 40398670 is about 6355.9948080533. The cubic root of 40398670 is about 343.1276288973.

The spelling of 40398670 in words is "forty million, three hundred ninety-eight thousand, six hundred seventy".