84031378 has 8 divisors (see below), whose sum is σ = 126089100. Its totient is φ = 42001680.

The previous prime is 84031373. The next prime is 84031379. The reversal of 84031378 is 87313048.

It can be written as a sum of positive squares in 2 ways, for example, as 48902049 + 35129329 = 6993^2 + 5927^2 .

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

It is a super-2 number, since 2×84031378² = 14122544977157768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84031373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3868 + ... + 13528.

Almost surely, 2^84031378 is an apocalyptic number.

84031378 is a deficient number, since it is larger than the sum of its proper divisors (42057722).

84031378 is a wasteful number, since it uses less digits than its factorization.

84031378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 84031378 is about 9166.8630403208. The cubic root of 84031378 is about 438.0064391650.

The spelling of 84031378 in words is "eighty-four million, thirty-one thousand, three hundred seventy-eight".