63435890 has 24 divisors (see below), whose sum is σ = 132828012. Its totient is φ = 21749280.

The previous prime is 63435887. The next prime is 63435893. The reversal of 63435890 is 9853436.

It is an interprime number because it is at equal distance from previous prime (63435887) and next prime (63435893).

It can be written as a sum of positive squares in 2 ways, for example, as 58323769 + 5112121 = 7637^2 + 2261^2 .

It is a super-2 number, since 2×63435890² = 8048224280184200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63435893) 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, 64241 + ... + 65220.

Almost surely, 2^63435890 is an apocalyptic number.

63435890 is an abundant number, since it is smaller than the sum of its proper divisors (69392122).

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

63435890 is a wasteful number, since it uses less digits than its factorization.

63435890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129482 (or 129475 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 63435890 is about 7964.6650902596. The cubic root of 63435890 is about 398.8213009162.

The spelling of 63435890 in words is "sixty-three million, four hundred thirty-five thousand, eight hundred ninety".