47261978 has 8 divisors (see below), whose sum is σ = 72401472. Its totient is φ = 23128156.

The previous prime is 47261969. The next prime is 47261983. The reversal of 47261978 is 87916274.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251300 + ... + 251487.

It is an arithmetic number, because the mean of its divisors is an integer number (9050184).

Almost surely, 2^47261978 is an apocalyptic number.

47261978 is a deficient number, since it is larger than the sum of its proper divisors (25139494).

47261978 is a wasteful number, since it uses less digits than its factorization.

47261978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502836.

The product of its digits is 169344, while the sum is 44.

The square root of 47261978 is about 6874.7347585198. The cubic root of 47261978 is about 361.5518859172.

The spelling of 47261978 in words is "forty-seven million, two hundred sixty-one thousand, nine hundred seventy-eight".