47439765 has 36 divisors (see below), whose sum is σ = 85044492. Its totient is φ = 24462720.

The previous prime is 47439757. The next prime is 47439781. The reversal of 47439765 is 56793474.

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 32182929 = 3906^2 + 5673^2 .

It is not a de Polignac number, because 47439765 - 2³ = 47439757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 47439765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42697 + ... + 43793.

It is an arithmetic number, because the mean of its divisors is an integer number (2362347).

Almost surely, 2^47439765 is an apocalyptic number.

47439765 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47439765 is a deficient number, since it is larger than the sum of its proper divisors (37604727).

47439765 is a wasteful number, since it uses less digits than its factorization.

47439765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1136 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 47439765 is about 6887.6530835982. The cubic root of 47439765 is about 362.0046726705.

The spelling of 47439765 in words is "forty-seven million, four hundred thirty-nine thousand, seven hundred sixty-five".