1530247440 has 40 divisors (see below), whose sum is σ = 4743767808. Its totient is φ = 408065920.

The previous prime is 1530247421. The next prime is 1530247463. The reversal of 1530247440 is 447420351.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1530247398 and 1530247407.

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, 3187776 + ... + 3188255.

Almost surely, 2^1530247440 is an apocalyptic number.

1530247440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1530247440 is an abundant number, since it is smaller than the sum of its proper divisors (3213520368).

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

1530247440 is a wasteful number, since it uses less digits than its factorization.

1530247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6376047 (or 6376041 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 1530247440 is about 39118.3772669573. The cubic root of 1530247440 is about 1152.3574676729.

Adding to 1530247440 its reverse (447420351), we get a palindrome (1977667791).

The spelling of 1530247440 in words is "one billion, five hundred thirty million, two hundred forty-seven thousand, four hundred forty".