47739428 has 12 divisors (see below), whose sum is σ = 91138992. Its totient is φ = 21699720.

The previous prime is 47739397. The next prime is 47739469. The reversal of 47739428 is 82493774.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1084987 = 47739428 / (4 + 7 + 7 + 3 + 9 + 4 + 2 + 8).

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, 542450 + ... + 542537.

It is an arithmetic number, because the mean of its divisors is an integer number (7594916).

Almost surely, 2^47739428 is an apocalyptic number.

It is an amenable number.

47739428 is a deficient number, since it is larger than the sum of its proper divisors (43399564).

47739428 is a wasteful number, since it uses less digits than its factorization.

47739428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085002 (or 1085000 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 47739428 is about 6909.3724751239. The cubic root of 47739428 is about 362.7652989343.

The spelling of 47739428 in words is "forty-seven million, seven hundred thirty-nine thousand, four hundred twenty-eight".