83445478 has 4 divisors (see below), whose sum is σ = 125168220. Its totient is φ = 41722738.

The previous prime is 83445443. The next prime is 83445491. The reversal of 83445478 is 87454438.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20861368 + ... + 20861371.

It is an arithmetic number, because the mean of its divisors is an integer number (31292055).

Almost surely, 2^83445478 is an apocalyptic number.

83445478 is a deficient number, since it is larger than the sum of its proper divisors (41722742).

83445478 is a wasteful number, since it uses less digits than its factorization.

83445478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41722741.

The product of its digits is 430080, while the sum is 43.

The square root of 83445478 is about 9134.8496429881. The cubic root of 83445478 is about 436.9860793217.

The spelling of 83445478 in words is "eighty-three million, four hundred forty-five thousand, four hundred seventy-eight".