47978455 has 16 divisors (see below), whose sum is σ = 67579200. Its totient is φ = 32009472.

The previous prime is 47978453. The next prime is 47978461. The reversal of 47978455 is 55487974.

It is a cyclic number.

It is not a de Polignac number, because 47978455 - 2¹ = 47978453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47978399 and 47978408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47978453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17230 + ... + 19819.

It is an arithmetic number, because the mean of its divisors is an integer number (4223700).

Almost surely, 2^47978455 is an apocalyptic number.

47978455 is a deficient number, since it is larger than the sum of its proper divisors (19600745).

47978455 is a wasteful number, since it uses less digits than its factorization.

47978455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37098.

The product of its digits is 1411200, while the sum is 49.

The square root of 47978455 is about 6926.6481793144. The cubic root of 47978455 is about 363.3697356190.

The spelling of 47978455 in words is "forty-seven million, nine hundred seventy-eight thousand, four hundred fifty-five".