47775646 has 8 divisors (see below), whose sum is σ = 74779344. Its totient is φ = 22849200.

The previous prime is 47775613. The next prime is 47775659. The reversal of 47775646 is 64657774.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 1038601 = 47775646 / (4 + 7 + 7 + 7 + 5 + 6 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 47775596 and 47775605.

It is a congruent number.

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, 519255 + ... + 519346.

It is an arithmetic number, because the mean of its divisors is an integer number (9347418).

Almost surely, 2^47775646 is an apocalyptic number.

47775646 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

47775646 is a deficient number, since it is larger than the sum of its proper divisors (27003698).

47775646 is a wasteful number, since it uses less digits than its factorization.

47775646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038626.

The product of its digits is 987840, while the sum is 46.

The square root of 47775646 is about 6911.9929108760. The cubic root of 47775646 is about 362.8570142659.

The spelling of 47775646 in words is "forty-seven million, seven hundred seventy-five thousand, six hundred forty-six".