47685690 has 96 divisors (see below), whose sum is σ = 136216080. Its totient is φ = 11501568.

The previous prime is 47685689. The next prime is 47685691. The reversal of 47685690 is 9658674.

47685690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47685689) and next prime (47685691).

It can be written as a sum of positive squares in 8 ways, for example, as 14265729 + 33419961 = 3777^2 + 5781^2 .

It is a super-2 number, since 2×47685690² = 4547850061552200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47685691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61626 + ... + 62394.

Almost surely, 2^47685690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47685690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68108040).

47685690 is an abundant number, since it is smaller than the sum of its proper divisors (88530390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47685690 is a wasteful number, since it uses less digits than its factorization.

47685690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 47685690 is about 6905.4826044238. The cubic root of 47685690 is about 362.6291319571.

The spelling of 47685690 in words is "forty-seven million, six hundred eighty-five thousand, six hundred ninety".