40690398 has 16 divisors (see below), whose sum is σ = 93006720. Its totient is φ = 11625816.

The previous prime is 40690387. The next prime is 40690399. The reversal of 40690398 is 89309604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40690399) 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, 484368 + ... + 484451.

It is an arithmetic number, because the mean of its divisors is an integer number (5812920).

Almost surely, 2^40690398 is an apocalyptic number.

40690398 is an abundant number, since it is smaller than the sum of its proper divisors (52316322).

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

40690398 is a wasteful number, since it uses less digits than its factorization.

40690398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968831.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 40690398 is about 6378.9025701918. The cubic root of 40690398 is about 343.9515830091.

The spelling of 40690398 in words is "forty million, six hundred ninety thousand, three hundred ninety-eight".