47663890 has 16 divisors (see below), whose sum is σ = 86971608. Its totient is φ = 18804096.

The previous prime is 47663887. The next prime is 47663893. The reversal of 47663890 is 9836674.

It is a happy number.

47663890 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 (47663887) and next prime (47663893).

It can be written as a sum of positive squares in 4 ways, for example, as 40106889 + 7557001 = 6333^2 + 2749^2 .

It is a super-4 number, since 4×47663890⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (47663893) 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 7 ways as a sum of consecutive naturals, for example, 31917 + ... + 33376.

Almost surely, 2^47663890 is an apocalyptic number.

47663890 is a deficient number, since it is larger than the sum of its proper divisors (39307718).

47663890 is a wasteful number, since it uses less digits than its factorization.

47663890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65373.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 47663890 is about 6903.9039680459. The cubic root of 47663890 is about 362.5738636642.

The spelling of 47663890 in words is "forty-seven million, six hundred sixty-three thousand, eight hundred ninety".