40399268 has 48 divisors (see below), whose sum is σ = 89169024. Its totient is φ = 15586560.

The previous prime is 40399267. The next prime is 40399277. The reversal of 40399268 is 86299304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (40399267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13571 + ... + 16277.

It is an arithmetic number, because the mean of its divisors is an integer number (1857688).

Almost surely, 2^40399268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40399268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44584512).

40399268 is an abundant number, since it is smaller than the sum of its proper divisors (48769756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40399268 is a wasteful number, since it uses less digits than its factorization.

40399268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772 (or 2770 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 40399268 is about 6356.0418500825. The cubic root of 40399268 is about 343.1293219341.

The spelling of 40399268 in words is "forty million, three hundred ninety-nine thousand, two hundred sixty-eight".