40638707398 has 16 divisors (see below), whose sum is σ = 62038931040. Its totient is φ = 19959940800.

The previous prime is 40638707393. The next prime is 40638707449. The reversal of 40638707398 is 89370783604.

40638707398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40638707393) 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, 126018 + ... + 311701.

It is an arithmetic number, because the mean of its divisors is an integer number (3877433190).

Almost surely, 2^40638707398 is an apocalyptic number.

40638707398 is a deficient number, since it is larger than the sum of its proper divisors (21400223642).

40638707398 is a wasteful number, since it uses less digits than its factorization.

40638707398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438543.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 40638707398 in words is "forty billion, six hundred thirty-eight million, seven hundred seven thousand, three hundred ninety-eight".