1630354420 has 24 divisors (see below), whose sum is σ = 3455159400. Its totient is φ = 646157952.

The previous prime is 1630354403. The next prime is 1630354433. The reversal of 1630354420 is 244530361.

It can be written as a sum of positive squares in 4 ways, for example, as 1747684 + 1628606736 = 1322^2 + 40356^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371755 + ... + 376114.

It is an arithmetic number, because the mean of its divisors is an integer number (143964975).

Almost surely, 2^1630354420 is an apocalyptic number.

1630354420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630354420 is an abundant number, since it is smaller than the sum of its proper divisors (1824804980).

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

1630354420 is a wasteful number, since it uses less digits than its factorization.

1630354420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747987 (or 747985 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 1630354420 is about 40377.6475292952. The cubic root of 1630354420 is about 1176.9572136621.

Adding to 1630354420 its reverse (244530361), we get a palindrome (1874884781).

The spelling of 1630354420 in words is "one billion, six hundred thirty million, three hundred fifty-four thousand, four hundred twenty".