42194393440 has 24 divisors (see below), whose sum is σ = 99684254880. Its totient is φ = 16877757312.

The previous prime is 42194393429. The next prime is 42194393441. The reversal of 42194393440 is 4439349124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42194393441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131857320 + ... + 131857639.

It is an arithmetic number, because the mean of its divisors is an integer number (4153510620).

Almost surely, 2^42194393440 is an apocalyptic number.

42194393440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42194393440 is an abundant number, since it is smaller than the sum of its proper divisors (57489861440).

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

42194393440 is a wasteful number, since it uses less digits than its factorization.

42194393440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263714974 (or 263714966 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 42194393440 in words is "forty-two billion, one hundred ninety-four million, three hundred ninety-three thousand, four hundred forty".