40239557040 has 40 divisors (see below), whose sum is σ = 124742627568. Its totient is φ = 10730548480.

The previous prime is 40239557023. The next prime is 40239557063. The reversal of 40239557040 is 4075593204.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40239557040.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83832171 + ... + 83832650.

Almost surely, 2^40239557040 is an apocalyptic number.

40239557040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40239557040 is an abundant number, since it is smaller than the sum of its proper divisors (84503070528).

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

40239557040 is a wasteful number, since it uses less digits than its factorization.

40239557040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167664837 (or 167664831 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 40239557040 in words is "forty billion, two hundred thirty-nine million, five hundred fifty-seven thousand, forty".