1630121440 has 48 divisors (see below), whose sum is σ = 3859909200. Its totient is φ = 650567680.

The previous prime is 1630121431. The next prime is 1630121459. The reversal of 1630121440 is 441210361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60495 + ... + 83185.

It is an arithmetic number, because the mean of its divisors is an integer number (80414775).

Almost surely, 2^1630121440 is an apocalyptic number.

1630121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630121440 is an abundant number, since it is smaller than the sum of its proper divisors (2229787760).

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

1630121440 is a wasteful number, since it uses less digits than its factorization.

1630121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23155 (or 23147 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1630121440 is about 40374.7624141616. The cubic root of 1630121440 is about 1176.9011480298.

The spelling of 1630121440 in words is "one billion, six hundred thirty million, one hundred twenty-one thousand, four hundred forty".