40389022494 has 64 divisors (see below), whose sum is σ = 94618425600. Its totient is φ = 12735369504.

The previous prime is 40389022493. The next prime is 40389022529. The reversal of 40389022494 is 49422098304.

It is a happy number.

40389022494 is a `hidden beast` number, since 40 + 38 + 90 + 2 + 2 + 494 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389022493) 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, 665529 + ... + 723675.

It is an arithmetic number, because the mean of its divisors is an integer number (1478412900).

Almost surely, 2^40389022494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40389022494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47309212800).

40389022494 is an abundant number, since it is smaller than the sum of its proper divisors (54229403106).

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

40389022494 is a wasteful number, since it uses less digits than its factorization.

40389022494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58854 (or 58848 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 40389022494 in words is "forty billion, three hundred eighty-nine million, twenty-two thousand, four hundred ninety-four".