84780338 has 4 divisors (see below), whose sum is σ = 127170510. Its totient is φ = 42390168.

The previous prime is 84780331. The next prime is 84780349. The reversal of 84780338 is 83308748.

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

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 2024929 = 9097^2 + 1423^2 .

It is a super-2 number, since 2×84780338² = 14375411422788488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84780295 and 84780304.

It is not an unprimeable number, because it can be changed into a prime (84780331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21195083 + ... + 21195086.

Almost surely, 2^84780338 is an apocalyptic number.

84780338 is a deficient number, since it is larger than the sum of its proper divisors (42390172).

84780338 is a wasteful number, since it uses less digits than its factorization.

84780338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42390171.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 84780338 is about 9207.6239063072. The cubic root of 84780338 is about 439.3038889534.

The spelling of 84780338 in words is "eighty-four million, seven hundred eighty thousand, three hundred thirty-eight".