40400265 has 8 divisors (see below), whose sum is σ = 64640448. Its totient is φ = 21546800.

The previous prime is 40400249. The next prime is 40400267. The reversal of 40400265 is 56200404.

It is a happy number.

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

It is not a de Polignac number, because 40400265 - 2⁴ = 40400249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40400267) 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, 1346661 + ... + 1346690.

It is an arithmetic number, because the mean of its divisors is an integer number (8080056).

Almost surely, 2^40400265 is an apocalyptic number.

It is an amenable number.

40400265 is a deficient number, since it is larger than the sum of its proper divisors (24240183).

40400265 is a wasteful number, since it uses less digits than its factorization.

40400265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693359.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40400265 is about 6356.1202789123. The cubic root of 40400265 is about 343.1321445687.

Adding to 40400265 its reverse (56200404), we get a palindrome (96600669).

The spelling of 40400265 in words is "forty million, four hundred thousand, two hundred sixty-five".