1242644480 has 240 divisors, whose sum is σ = 3737010816. Its totient is φ = 385351680.

The previous prime is 1242644477. The next prime is 1242644509. The reversal of 1242644480 is 844462421.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1242644480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6307742 + ... + 6307938.

Almost surely, 2^1242644480 is an apocalyptic number.

1242644480 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 1242644480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868505408).

1242644480 is an abundant number, since it is smaller than the sum of its proper divisors (2494366336).

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

1242644480 is an equidigital number, since it uses as much as digits as its factorization.

1242644480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 35.

The square root of 1242644480 is about 35251.1628177001. The cubic root of 1242644480 is about 1075.1002552974.

The spelling of 1242644480 in words is "one billion, two hundred forty-two million, six hundred forty-four thousand, four hundred eighty".