8403243778 has 8 divisors (see below), whose sum is σ = 12611622672. Its totient is φ = 4199369556.

The previous prime is 8403243743. The next prime is 8403243839. The reversal of 8403243778 is 8773423048.

It is a happy number.

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

It is a super-2 number, since 2×8403243778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121500 + ... + 1128967.

It is an arithmetic number, because the mean of its divisors is an integer number (1576452834).

Almost surely, 2^8403243778 is an apocalyptic number.

8403243778 is a deficient number, since it is larger than the sum of its proper divisors (4208378894).

8403243778 is a wasteful number, since it uses less digits than its factorization.

8403243778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252336.

The product of its (nonzero) digits is 903168, while the sum is 46.

The square root of 8403243778 is about 91669.2084508206. The cubic root of 8403243778 is about 2033.0543437760.

The spelling of 8403243778 in words is "eight billion, four hundred three million, two hundred forty-three thousand, seven hundred seventy-eight".