42399324 is nontrivially palindromic in base 10.
It is a tau number, because it is divible by the number of its divisors (36).
It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
It is an unprimeable number.
Almost surely, 242399324 is an apocalyptic number.
42399324 is a gapful number since it is divisible by the number (44) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42399324 is a wasteful number, since it uses less digits than its factorization.
42399324 is an evil number, because the sum of its binary digits is even.
The square root of 42399324 is about 6511.4763302956. The cubic root of 42399324 is about 348.7008270748.
The spelling of 42399324 in words is "forty-two million, three hundred ninety-nine thousand, three hundred twenty-four".