40398379780 has 48 divisors (see below), whose sum is σ = 92611512000. Its totient is φ = 14680400000.

The previous prime is 40398379751. The next prime is 40398379843. The reversal of 40398379780 is 8797389304.

It is a super-2 number, since 2×40398379780² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268530 + ... + 391030.

It is an arithmetic number, because the mean of its divisors is an integer number (1929406500).

Almost surely, 2^40398379780 is an apocalyptic number.

It is an amenable number.

40398379780 is an abundant number, since it is smaller than the sum of its proper divisors (52213132220).

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

40398379780 is a wasteful number, since it uses less digits than its factorization.

40398379780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124020 (or 124018 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 40398379780 in words is "forty billion, three hundred ninety-eight million, three hundred seventy-nine thousand, seven hundred eighty".