40420369980 has 96 divisors (see below), whose sum is σ = 126051670080. Its totient is φ = 10753102080.

The previous prime is 40420369949. The next prime is 40420369981. The reversal of 40420369980 is 8996302404.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420369981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138442 + ... + 316238.

It is an arithmetic number, because the mean of its divisors is an integer number (1313038230).

Almost surely, 2^40420369980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40420369980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63025835040).

40420369980 is an abundant number, since it is smaller than the sum of its proper divisors (85631300100).

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

40420369980 is a wasteful number, since it uses less digits than its factorization.

40420369980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178236 (or 178228 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 40420369980 in words is "forty billion, four hundred twenty million, three hundred sixty-nine thousand, nine hundred eighty".