40578679 has 4 divisors (see below), whose sum is σ = 40649584. Its totient is φ = 40507776.

The previous prime is 40578667. The next prime is 40578697. The reversal of 40578679 is 97687504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40578679 - 2¹³ = 40570487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40578619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34587 + ... + 35740.

It is an arithmetic number, because the mean of its divisors is an integer number (10162396).

Almost surely, 2^40578679 is an apocalyptic number.

40578679 is a deficient number, since it is larger than the sum of its proper divisors (70905).

40578679 is an equidigital number, since it uses as much as digits as its factorization.

40578679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70904.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 40578679 is about 6370.1396374020. The cubic root of 40578679 is about 343.6365115609.

The spelling of 40578679 in words is "forty million, five hundred seventy-eight thousand, six hundred seventy-nine".