63406140 has 48 divisors (see below), whose sum is σ = 202900992. Its totient is φ = 14492736.

The previous prime is 63406127. The next prime is 63406153. The reversal of 63406140 is 4160436.

It is an interprime number because it is at equal distance from previous prime (63406127) and next prime (63406153).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 63406140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75064 + ... + 75903.

It is an arithmetic number, because the mean of its divisors is an integer number (4227104).

Almost surely, 2^63406140 is an apocalyptic number.

63406140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63406140 is an abundant number, since it is smaller than the sum of its proper divisors (139494852).

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

63406140 is a wasteful number, since it uses less digits than its factorization.

63406140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150986 (or 150984 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 63406140 is about 7962.7972471990. The cubic root of 63406140 is about 398.7589451058.

Adding to 63406140 its reverse (4160436), we get a palindrome (67566576).

It can be divided in two parts, 63406 and 140, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 63406140 in words is "sixty-three million, four hundred six thousand, one hundred forty".