47687690 has 8 divisors (see below), whose sum is σ = 85837860. Its totient is φ = 19075072.

The previous prime is 47687683. The next prime is 47687699. The reversal of 47687690 is 9678674.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46117681 + 1570009 = 6791^2 + 1253^2 .

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

It is a super-2 number, since 2×47687690² = 4548231555072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47687699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2384375 + ... + 2384394.

Almost surely, 2^47687690 is an apocalyptic number.

47687690 is a deficient number, since it is larger than the sum of its proper divisors (38150170).

47687690 is a wasteful number, since it uses less digits than its factorization.

47687690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768776.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 47687690 is about 6905.6274153765. The cubic root of 47687690 is about 362.6342015991.

The spelling of 47687690 in words is "forty-seven million, six hundred eighty-seven thousand, six hundred ninety".