40255398420 has 48 divisors (see below), whose sum is σ = 118647493440. Its totient is φ = 10169784576.

The previous prime is 40255398389. The next prime is 40255398473. The reversal of 40255398420 is 2489355204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17654737 + ... + 17657016.

It is an arithmetic number, because the mean of its divisors is an integer number (2471822780).

Almost surely, 2^40255398420 is an apocalyptic number.

It is an amenable number.

40255398420 is an abundant number, since it is smaller than the sum of its proper divisors (78392095020).

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

40255398420 is a wasteful number, since it uses less digits than its factorization.

40255398420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35311784 (or 35311782 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 40255398420 in words is "forty billion, two hundred fifty-five million, three hundred ninety-eight thousand, four hundred twenty".