40400705 has 8 divisors (see below), whose sum is σ = 48605352. Its totient is φ = 32237568.

The previous prime is 40400603. The next prime is 40400713. The reversal of 40400705 is 50700404.

It can be written as a sum of positive squares in 4 ways, for example, as 4592449 + 35808256 = 2143^2 + 5984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40400705 - 2¹⁴ = 40384321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8192 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (6075669).

Almost surely, 2^40400705 is an apocalyptic number.

It is an amenable number.

40400705 is a deficient number, since it is larger than the sum of its proper divisors (8204647).

40400705 is a wasteful number, since it uses less digits than its factorization.

40400705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20755.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 40400705 is about 6356.1548911272. The cubic root of 40400705 is about 343.1333902503.

The spelling of 40400705 in words is "forty million, four hundred thousand, seven hundred five".