78291334 has 16 divisors (see below), whose sum is σ = 131576976. Its totient is φ = 34624800.

The previous prime is 78291299. The next prime is 78291359. The reversal of 78291334 is 43319287.

It is a super-2 number, since 2×78291334² = 12259065958999112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 78291293 and 78291302.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47277 + ... + 48904.

It is an arithmetic number, because the mean of its divisors is an integer number (8223561).

Almost surely, 2^78291334 is an apocalyptic number.

78291334 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

78291334 is a deficient number, since it is larger than the sum of its proper divisors (53285642).

78291334 is a wasteful number, since it uses less digits than its factorization.

78291334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96231.

The product of its digits is 36288, while the sum is 37.

The square root of 78291334 is about 8848.2390338417. The cubic root of 78291334 is about 427.7971605592.

The spelling of 78291334 in words is "seventy-eight million, two hundred ninety-one thousand, three hundred thirty-four".