40018890000 has 100 divisors (see below), whose sum is σ = 129186409616. Its totient is φ = 10671696000.

The previous prime is 40018889993. The next prime is 40018890017. The reversal of 40018890000 is 9881004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 40018890000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 636982 + ... + 696981.

Almost surely, 2^40018890000 is an apocalyptic number.

40018890000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40018890000 is an abundant number, since it is smaller than the sum of its proper divisors (89167519616).

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

40018890000 is a wasteful number, since it uses less digits than its factorization.

40018890000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333994 (or 1333973 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 40018890000 in words is "forty billion, eighteen million, eight hundred ninety thousand".