87730238 has 4 divisors (see below), whose sum is σ = 131595360. Its totient is φ = 43865118.

The previous prime is 87730231. The next prime is 87730243. The reversal of 87730238 is 83203778.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87730231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21932558 + ... + 21932561.

It is an arithmetic number, because the mean of its divisors is an integer number (32898840).

Almost surely, 2^87730238 is an apocalyptic number.

87730238 is a deficient number, since it is larger than the sum of its proper divisors (43865122).

87730238 is a wasteful number, since it uses less digits than its factorization.

87730238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43865121.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 87730238 is about 9366.4421206774. The cubic root of 87730238 is about 444.3410488692.

The spelling of 87730238 in words is "eighty-seven million, seven hundred thirty thousand, two hundred thirty-eight".