438321493442 has 16 divisors (see below), whose sum is σ = 751844927232. Its totient is φ = 187742905440.

The previous prime is 438321493409. The next prime is 438321493447. The reversal of 438321493442 is 244394123834.

It is a super-2 number, since 2×438321493442² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (438321493447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9071978 + ... + 9120165.

It is an arithmetic number, because the mean of its divisors is an integer number (46990307952).

Almost surely, 2^438321493442 is an apocalyptic number.

438321493442 is a deficient number, since it is larger than the sum of its proper divisors (313523433790).

438321493442 is a wasteful number, since it uses less digits than its factorization.

438321493442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18193873.

The product of its digits is 1990656, while the sum is 47.

The spelling of 438321493442 in words is "four hundred thirty-eight billion, three hundred twenty-one million, four hundred ninety-three thousand, four hundred forty-two".