93889890 has 24 divisors (see below), whose sum is σ = 244113948. Its totient is φ = 25037280.

The previous prime is 93889867. The next prime is 93889891. The reversal of 93889890 is 9898839.

It can be written as a sum of positive squares in 2 ways, for example, as 89813529 + 4076361 = 9477^2 + 2019^2 .

It is a super-2 number, since 2×93889890² = 17630622888424200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (93889891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521521 + ... + 521700.

Almost surely, 2^93889890 is an apocalyptic number.

93889890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

93889890 is an abundant number, since it is smaller than the sum of its proper divisors (150224058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

93889890 is a wasteful number, since it uses less digits than its factorization.

93889890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043234 (or 1043231 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 93889890 is about 9689.6795612652. The cubic root of 93889890 is about 454.5059888038.

The spelling of 93889890 in words is "ninety-three million, eight hundred eighty-nine thousand, eight hundred ninety".