63990006 has 16 divisors (see below), whose sum is σ = 135508464. Its totient is φ = 20075264.

The previous prime is 63990001. The next prime is 63990007. The reversal of 63990006 is 60009936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63990001) 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, 313575 + ... + 313778.

It is an arithmetic number, because the mean of its divisors is an integer number (8469279).

Almost surely, 2^63990006 is an apocalyptic number.

63990006 is an abundant number, since it is smaller than the sum of its proper divisors (71518458).

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

63990006 is a wasteful number, since it uses less digits than its factorization.

63990006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627375.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 63990006 is about 7999.3753506133. The cubic root of 63990006 is about 399.9791780828.

The spelling of 63990006 in words is "sixty-three million, nine hundred ninety thousand, six".