40840620880 has 40 divisors (see below), whose sum is σ = 96255203112. Its totient is φ = 16112461824.

The previous prime is 40840620833. The next prime is 40840620881. The reversal of 40840620880 is 8802604804.

It can be written as a sum of positive squares in 4 ways, for example, as 110923024 + 40729697856 = 10532^2 + 201816^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40840620881) 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, 3490789 + ... + 3502468.

Almost surely, 2^40840620880 is an apocalyptic number.

40840620880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40840620880 is an abundant number, since it is smaller than the sum of its proper divisors (55414582232).

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

40840620880 is a wasteful number, since it uses less digits than its factorization.

40840620880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993343 (or 6993337 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The spelling of 40840620880 in words is "forty billion, eight hundred forty million, six hundred twenty thousand, eight hundred eighty".