40399902 has 12 divisors (see below), whose sum is σ = 87533160. Its totient is φ = 13466628.

The previous prime is 40399901. The next prime is 40399907. The reversal of 40399902 is 20999304.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40399901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122202 + ... + 1122237.

It is an arithmetic number, because the mean of its divisors is an integer number (7294430).

Almost surely, 2^40399902 is an apocalyptic number.

40399902 is an abundant number, since it is smaller than the sum of its proper divisors (47133258).

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

40399902 is a wasteful number, since it uses less digits than its factorization.

40399902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244447 (or 2244444 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 40399902 is about 6356.0917236931. The cubic root of 40399902 is about 343.1311168746.

The spelling of 40399902 in words is "forty million, three hundred ninety-nine thousand, nine hundred two".