85784404 has 6 divisors (see below), whose sum is σ = 150122714. Its totient is φ = 42892200.

The previous prime is 85784381. The next prime is 85784429. The reversal of 85784404 is 40448758.

It can be written as a sum of positive squares in only one way, i.e., 85599504 + 184900 = 9252^2 + 430^2 .

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, 10723047 + ... + 10723054.

Almost surely, 2^85784404 is an apocalyptic number.

It is an amenable number.

85784404 is a deficient number, since it is larger than the sum of its proper divisors (64338310).

85784404 is a wasteful number, since it uses less digits than its factorization.

85784404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446105 (or 21446103 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 85784404 is about 9261.9870438260. The cubic root of 85784404 is about 441.0313341680.

The spelling of 85784404 in words is "eighty-five million, seven hundred eighty-four thousand, four hundred four".