40987391040 has 448 divisors, whose sum is σ = 151687987200. Its totient is φ = 10398947328.

The previous prime is 40987391021. The next prime is 40987391047. The reversal of 40987391040 is 4019378904.

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

It is not an unprimeable number, because it can be changed into a prime (40987391047) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47493649 + ... + 47494511.

Almost surely, 2^40987391040 is an apocalyptic number.

40987391040 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 40987391040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75843993600).

40987391040 is an abundant number, since it is smaller than the sum of its proper divisors (110700596160).

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

40987391040 is a wasteful number, since it uses less digits than its factorization.

40987391040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 40987391040 in words is "forty billion, nine hundred eighty-seven million, three hundred ninety-one thousand, forty".