47993690 has 8 divisors (see below), whose sum is σ = 86388660. Its totient is φ = 19197472.

The previous prime is 47993623. The next prime is 47993713. The reversal of 47993690 is 9639974.

It can be written as a sum of positive squares in 2 ways, for example, as 41434969 + 6558721 = 6437^2 + 2561^2 .

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

It is a super-2 number, since 2×47993690² = 4606788559632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2399675 + ... + 2399694.

Almost surely, 2^47993690 is an apocalyptic number.

47993690 is a deficient number, since it is larger than the sum of its proper divisors (38394970).

47993690 is a wasteful number, since it uses less digits than its factorization.

47993690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799376.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 47993690 is about 6927.7478302837. The cubic root of 47993690 is about 363.4081928256.

The spelling of 47993690 in words is "forty-seven million, nine hundred ninety-three thousand, six hundred ninety".