40478670 has 32 divisors (see below), whose sum is σ = 107943840. Its totient is φ = 10794240.

The previous prime is 40478663. The next prime is 40478671. The reversal of 40478670 is 7687404.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40478671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74691 + ... + 75230.

It is an arithmetic number, because the mean of its divisors is an integer number (3373245).

Almost surely, 2^40478670 is an apocalyptic number.

40478670 is an abundant number, since it is smaller than the sum of its proper divisors (67465170).

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

40478670 is a wasteful number, since it uses less digits than its factorization.

40478670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149937 (or 149931 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 40478670 is about 6362.2849668967. The cubic root of 40478670 is about 343.3539738955.

The spelling of 40478670 in words is "forty million, four hundred seventy-eight thousand, six hundred seventy".