83278785 has 8 divisors (see below), whose sum is σ = 133246080. Its totient is φ = 44415344.

The previous prime is 83278781. The next prime is 83278799. The reversal of 83278785 is 58787238.

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

It is a cyclic number.

It is not a de Polignac number, because 83278785 - 2² = 83278781 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (83278781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2775945 + ... + 2775974.

It is an arithmetic number, because the mean of its divisors is an integer number (16655760).

Almost surely, 2^83278785 is an apocalyptic number.

It is an amenable number.

83278785 is a deficient number, since it is larger than the sum of its proper divisors (49967295).

83278785 is a wasteful number, since it uses less digits than its factorization.

83278785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551927.

The product of its digits is 752640, while the sum is 48.

The square root of 83278785 is about 9125.7210674006. The cubic root of 83278785 is about 436.6949068490.

The spelling of 83278785 in words is "eighty-three million, two hundred seventy-eight thousand, seven hundred eighty-five".