40397478 has 16 divisors (see below), whose sum is σ = 88140096. Its totient is φ = 12241640.

The previous prime is 40397459. The next prime is 40397479. The reversal of 40397478 is 87479304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305976 + ... + 306107.

It is an arithmetic number, because the mean of its divisors is an integer number (5508756).

Almost surely, 2^40397478 is an apocalyptic number.

40397478 is an abundant number, since it is smaller than the sum of its proper divisors (47742618).

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

40397478 is a wasteful number, since it uses less digits than its factorization.

40397478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612099.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 40397478 is about 6355.9010376185. The cubic root of 40397478 is about 343.1242540984.

The spelling of 40397478 in words is "forty million, three hundred ninety-seven thousand, four hundred seventy-eight".