1430663640 has 128 divisors (see below), whose sum is σ = 5063454720. Its totient is φ = 316454400.

The previous prime is 1430663629. The next prime is 1430663651. The reversal of 1430663640 is 463660341.

It is an interprime number because it is at equal distance from previous prime (1430663629) and next prime (1430663651).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1431 + ... + 53510.

It is an arithmetic number, because the mean of its divisors is an integer number (39558240).

Almost surely, 2^1430663640 is an apocalyptic number.

1430663640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1430663640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2531727360).

1430663640 is an abundant number, since it is smaller than the sum of its proper divisors (3632791080).

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

1430663640 is a wasteful number, since it uses less digits than its factorization.

1430663640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54993 (or 54989 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 1430663640 is about 37824.1145302835. The cubic root of 1430663640 is about 1126.7974269454.

The spelling of 1430663640 in words is "one billion, four hundred thirty million, six hundred sixty-three thousand, six hundred forty".