40691206 has 4 divisors (see below), whose sum is σ = 61036812. Its totient is φ = 20345602.

The previous prime is 40691159. The next prime is 40691207. The reversal of 40691206 is 60219604.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40691207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172800 + ... + 10172803.

It is an arithmetic number, because the mean of its divisors is an integer number (15259203).

Almost surely, 2^40691206 is an apocalyptic number.

40691206 is a deficient number, since it is larger than the sum of its proper divisors (20345606).

40691206 is a wasteful number, since it uses less digits than its factorization.

40691206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20345605.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40691206 is about 6378.9659036555. The cubic root of 40691206 is about 343.9538596399.

The spelling of 40691206 in words is "forty million, six hundred ninety-one thousand, two hundred six".