87758890 has 16 divisors (see below), whose sum is σ = 158079240. Its totient is φ = 35078400.

The previous prime is 87758813. The next prime is 87758899. The reversal of 87758890 is 9885778.

It can be written as a sum of positive squares in 4 ways, for example, as 66145689 + 21613201 = 8133^2 + 4649^2 .

It is a super-3 number, since 3×87758890³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (87758899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18790 + ... + 22990.

Almost surely, 2^87758890 is an apocalyptic number.

87758890 is a deficient number, since it is larger than the sum of its proper divisors (70320350).

87758890 is a wasteful number, since it uses less digits than its factorization.

87758890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The square root of 87758890 is about 9367.9714986757. The cubic root of 87758890 is about 444.3894163584.

The spelling of 87758890 in words is "eighty-seven million, seven hundred fifty-eight thousand, eight hundred ninety".