40128408620 has 24 divisors (see below), whose sum is σ = 84299670000. Its totient is φ = 16045646912.

The previous prime is 40128408611. The next prime is 40128408631. The reversal of 40128408620 is 2680482104.

It is a super-2 number, since 2×40128408620² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299495 + ... + 412254.

It is an arithmetic number, because the mean of its divisors is an integer number (3512486250).

Almost surely, 2^40128408620 is an apocalyptic number.

It is an amenable number.

40128408620 is an abundant number, since it is smaller than the sum of its proper divisors (44171261380).

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

40128408620 is a wasteful number, since it uses less digits than its factorization.

40128408620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714577 (or 714575 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The spelling of 40128408620 in words is "forty billion, one hundred twenty-eight million, four hundred eight thousand, six hundred twenty".