86263778 has 4 divisors (see below), whose sum is σ = 129395670. Its totient is φ = 43131888.

The previous prime is 86263769. The next prime is 86263789. The reversal of 86263778 is 87736268.

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., 44182609 + 42081169 = 6647^2 + 6487^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21565943 + ... + 21565946.

Almost surely, 2^86263778 is an apocalyptic number.

86263778 is a deficient number, since it is larger than the sum of its proper divisors (43131892).

86263778 is a wasteful number, since it uses less digits than its factorization.

86263778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43131891.

The product of its digits is 677376, while the sum is 47.

The square root of 86263778 is about 9287.8295634664. The cubic root of 86263778 is about 441.8513214506.

The spelling of 86263778 in words is "eighty-six million, two hundred sixty-three thousand, seven hundred seventy-eight".