78357290 has 16 divisors (see below), whose sum is σ = 153865440. Its totient is φ = 28493520.

The previous prime is 78357289. The next prime is 78357317. The reversal of 78357290 is 9275387.

It is a super-2 number, since 2×78357290² = 12279729792288200, which contains 22 as substring.

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, 356060 + ... + 356279.

It is an arithmetic number, because the mean of its divisors is an integer number (9616590).

Almost surely, 2^78357290 is an apocalyptic number.

78357290 is a deficient number, since it is larger than the sum of its proper divisors (75508150).

78357290 is a wasteful number, since it uses less digits than its factorization.

78357290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712357.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 78357290 is about 8851.9653185041. The cubic root of 78357290 is about 427.9172584398.

The spelling of 78357290 in words is "seventy-eight million, three hundred fifty-seven thousand, two hundred ninety".