2278406806 has 8 divisors (see below), whose sum is σ = 3680503344. Its totient is φ = 1051572360.

The previous prime is 2278406761. The next prime is 2278406807. The reversal of 2278406806 is 6086048722.

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

It is a super-2 number, since 2×2278406806² = 10382275147254243272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278406807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43815490 + ... + 43815541.

It is an arithmetic number, because the mean of its divisors is an integer number (460062918).

Almost surely, 2^2278406806 is an apocalyptic number.

2278406806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2278406806 is a deficient number, since it is larger than the sum of its proper divisors (1402096538).

2278406806 is a wasteful number, since it uses less digits than its factorization.

2278406806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87631046.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 2278406806 is about 47732.6597415229. The cubic root of 2278406806 is about 1315.8622354809.

The spelling of 2278406806 in words is "two billion, two hundred seventy-eight million, four hundred six thousand, eight hundred six".