438400734 has 8 divisors (see below), whose sum is σ = 876801480. Its totient is φ = 146133576.

The previous prime is 438400733. The next prime is 438400747. The reversal of 438400734 is 437004834.

It is a sphenic number, since it is the product of 3 distinct primes.

438400734 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 438400695 and 438400704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438400733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36533389 + ... + 36533400.

It is an arithmetic number, because the mean of its divisors is an integer number (109600185).

Almost surely, 2^438400734 is an apocalyptic number.

438400734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

438400734 is a wasteful number, since it uses less digits than its factorization.

438400734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73066794.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 438400734 is about 20938.0212532130. The cubic root of 438400734 is about 759.6678684942.

The spelling of 438400734 in words is "four hundred thirty-eight million, four hundred thousand, seven hundred thirty-four".