40408421508 has 192 divisors, whose sum is σ = 133098864640. Its totient is φ = 10313308800.

The previous prime is 40408421461. The next prime is 40408421509. The reversal of 40408421508 is 80512480404.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40408421509) 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, 238353 + ... + 370983.

Almost surely, 2^40408421508 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 40408421508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66549432320).

40408421508 is an abundant number, since it is smaller than the sum of its proper divisors (92690443132).

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

40408421508 is a wasteful number, since it uses less digits than its factorization.

40408421508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132695 (or 132687 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 40408421508 in words is "forty billion, four hundred eight million, four hundred twenty-one thousand, five hundred eight".