78135190 has 32 divisors (see below), whose sum is σ = 165924864. Its totient is φ = 25924320.

The previous prime is 78135181. The next prime is 78135203. The reversal of 78135190 is 9153187.

It is a happy number.

It is a super-2 number, since 2×78135190² = 12210215832672200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15834 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (5185152).

Almost surely, 2^78135190 is an apocalyptic number.

78135190 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78135190 is an abundant number, since it is smaller than the sum of its proper divisors (87789674).

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

78135190 is a wasteful number, since it uses less digits than its factorization.

78135190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36052.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 78135190 is about 8839.4111794848. The cubic root of 78135190 is about 427.5125721597.

The spelling of 78135190 in words is "seventy-eight million, one hundred thirty-five thousand, one hundred ninety".