63985590 has 24 divisors (see below), whose sum is σ = 166362768. Its totient is φ = 17062800.

The previous prime is 63985583. The next prime is 63985601. The reversal of 63985590 is 9558936.

63985590 is a `hidden beast` number, since 6 + 3 + 98 + 559 + 0 = 666.

It is a super-4 number, since 4×63985590⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355386 + ... + 355565.

It is an arithmetic number, because the mean of its divisors is an integer number (6931782).

Almost surely, 2^63985590 is an apocalyptic number.

63985590 is an abundant number, since it is smaller than the sum of its proper divisors (102377178).

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

63985590 is a wasteful number, since it uses less digits than its factorization.

63985590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710964 (or 710961 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 63985590 is about 7999.0993242990. The cubic root of 63985590 is about 399.9699769133.

The spelling of 63985590 in words is "sixty-three million, nine hundred eighty-five thousand, five hundred ninety".