78354466 has 8 divisors (see below), whose sum is σ = 118743660. Its totient is φ = 38773248.

The previous prime is 78354449. The next prime is 78354467. The reversal of 78354466 is 66445387.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 403225 = 8829^2 + 635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78354466² = 12278844684290312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78354467) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 201751 + ... + 202138.

Almost surely, 2^78354466 is an apocalyptic number.

78354466 is a deficient number, since it is larger than the sum of its proper divisors (40389194).

78354466 is a wasteful number, since it uses less digits than its factorization.

78354466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403988.

The product of its digits is 483840, while the sum is 43.

The square root of 78354466 is about 8851.8058044672. The cubic root of 78354466 is about 427.9121176594.

The spelling of 78354466 in words is "seventy-eight million, three hundred fifty-four thousand, four hundred sixty-six".