630421776 has 30 divisors (see below), whose sum is σ = 1764305790. Its totient is φ = 210140544.

The previous prime is 630421747. The next prime is 630421787. The reversal of 630421776 is 677124036.

630421776 is a `hidden beast` number, since 630 + 4 + 2 + 17 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 623001600 + 7420176 = 24960^2 + 2724^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 630421776.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2188821 + ... + 2189108.

It is an arithmetic number, because the mean of its divisors is an integer number (58810193).

Almost surely, 2^630421776 is an apocalyptic number.

It is an amenable number.

630421776 is an abundant number, since it is smaller than the sum of its proper divisors (1133884014).

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

630421776 is a wasteful number, since it uses less digits than its factorization.

630421776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377943 (or 4377934 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 630421776 is about 25108.2013692737. The cubic root of 630421776 is about 857.4531537504.

The spelling of 630421776 in words is "six hundred thirty million, four hundred twenty-one thousand, seven hundred seventy-six".