40469390 has 16 divisors (see below), whose sum is σ = 78448608. Its totient is φ = 14942496.

The previous prime is 40469383. The next prime is 40469393. The reversal of 40469390 is 9396404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40469390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40469393) 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, 155522 + ... + 155781.

It is an arithmetic number, because the mean of its divisors is an integer number (4903038).

Almost surely, 2^40469390 is an apocalyptic number.

40469390 is a deficient number, since it is larger than the sum of its proper divisors (37979218).

40469390 is a wasteful number, since it uses less digits than its factorization.

40469390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311323.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 40469390 is about 6361.5556273603. Note that the first 3 decimals coincide. The cubic root of 40469390 is about 343.3277331750.

The spelling of 40469390 in words is "forty million, four hundred sixty-nine thousand, three hundred ninety".