78190838 has 16 divisors (see below), whose sum is σ = 128088000. Its totient is φ = 35502600.

The previous prime is 78190793. The next prime is 78190841. The reversal of 78190838 is 83809187.

It is a super-2 number, since 2×78190838² = 12227614294284488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31793 + ... + 34163.

It is an arithmetic number, because the mean of its divisors is an integer number (8005500).

Almost surely, 2^78190838 is an apocalyptic number.

78190838 is a deficient number, since it is larger than the sum of its proper divisors (49897162).

78190838 is a wasteful number, since it uses less digits than its factorization.

78190838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 78190838 is about 8842.5583402090. The cubic root of 78190838 is about 427.6140397743.

It can be divided in two parts, 781 and 90838, that added together give a palindrome (91619).

The spelling of 78190838 in words is "seventy-eight million, one hundred ninety thousand, eight hundred thirty-eight".