40397078 has 16 divisors (see below), whose sum is σ = 64152000. Its totient is φ = 19025352.

The previous prime is 40397069. The next prime is 40397089. The reversal of 40397078 is 87079304.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3833 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (4009500).

Almost surely, 2^40397078 is an apocalyptic number.

40397078 is a deficient number, since it is larger than the sum of its proper divisors (23754922).

40397078 is a wasteful number, since it uses less digits than its factorization.

40397078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 40397078 is about 6355.8695707197. The cubic root of 40397078 is about 343.1231216007.

The spelling of 40397078 in words is "forty million, three hundred ninety-seven thousand, seventy-eight".