40389829887 has 32 divisors (see below), whose sum is σ = 59494383360. Its totient is φ = 24371239200.

The previous prime is 40389829871. The next prime is 40389829889. The reversal of 40389829887 is 78892898304.

It is a happy number.

It is not a de Polignac number, because 40389829887 - 2⁴ = 40389829871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389829889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 892312 + ... + 936482.

It is an arithmetic number, because the mean of its divisors is an integer number (1859199480).

Almost surely, 2^40389829887 is an apocalyptic number.

40389829887 is a deficient number, since it is larger than the sum of its proper divisors (19104553473).

40389829887 is a wasteful number, since it uses less digits than its factorization.

40389829887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44436 (or 44414 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 66.

The spelling of 40389829887 in words is "forty billion, three hundred eighty-nine million, eight hundred twenty-nine thousand, eight hundred eighty-seven".