78674290 has 16 divisors (see below), whose sum is σ = 143554968. Its totient is φ = 31038336.

The previous prime is 78674263. The next prime is 78674291. The reversal of 78674290 is 9247687.

It can be written as a sum of positive squares in 4 ways, for example, as 45738169 + 32936121 = 6763^2 + 5739^2 .

It is not an unprimeable number, because it can be changed into a prime (78674291) by changing a digit.

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, 53157 + ... + 54616.

Almost surely, 2^78674290 is an apocalyptic number.

78674290 is a deficient number, since it is larger than the sum of its proper divisors (64880678).

78674290 is a wasteful number, since it uses less digits than its factorization.

78674290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107853.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 78674290 is about 8869.8528736389. The cubic root of 78674290 is about 428.4935385962.

It can be divided in two parts, 786 and 74290, that added together give a square (75076 = 274²).

The spelling of 78674290 in words is "seventy-eight million, six hundred seventy-four thousand, two hundred ninety".