63851490 has 80 divisors (see below), whose sum is σ = 181828152. Its totient is φ = 16022016.

The previous prime is 63851483. The next prime is 63851497. The reversal of 63851490 is 9415836.

63851490 is a `hidden beast` number, since 638 + 5 + 14 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (63851483) and next prime (63851497).

It can be written as a sum of positive squares in 4 ways, for example, as 51969681 + 11881809 = 7209^2 + 3447^2 .

It is not an unprimeable number, because it can be changed into a prime (63851497) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11452 + ... + 16088.

Almost surely, 2^63851490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63851490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90914076).

63851490 is an abundant number, since it is smaller than the sum of its proper divisors (117976662).

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

63851490 is a wasteful number, since it uses less digits than its factorization.

63851490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673 (or 4664 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 63851490 is about 7990.7127341683. The cubic root of 63851490 is about 399.6903645432.

It can be divided in two parts, 6385 and 1490, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 63851490 in words is "sixty-three million, eight hundred fifty-one thousand, four hundred ninety".