40987929680 has 80 divisors (see below), whose sum is σ = 98478125568. Its totient is φ = 15849024000.

The previous prime is 40987929673. The next prime is 40987929691. The reversal of 40987929680 is 8692978904.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2399570 + ... + 2416590.

Almost surely, 2^40987929680 is an apocalyptic number.

40987929680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40987929680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49239062784).

40987929680 is an abundant number, since it is smaller than the sum of its proper divisors (57490195888).

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

40987929680 is a wasteful number, since it uses less digits than its factorization.

40987929680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18036 (or 18030 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 40987929680 in words is "forty billion, nine hundred eighty-seven million, nine hundred twenty-nine thousand, six hundred eighty".