1242608640 has 528 divisors, whose sum is σ = 5018130432. Its totient is φ = 260112384.

The previous prime is 1242608593. The next prime is 1242608651. The reversal of 1242608640 is 468062421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9784257 + ... + 9784383.

Almost surely, 2^1242608640 is an apocalyptic number.

1242608640 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 1242608640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2509065216).

1242608640 is an abundant number, since it is smaller than the sum of its proper divisors (3775521792).

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

1242608640 is a wasteful number, since it uses less digits than its factorization.

1242608640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1242608640 is about 35250.6544620096. The cubic root of 1242608640 is about 1075.0899192857.

The spelling of 1242608640 in words is "one billion, two hundred forty-two million, six hundred eight thousand, six hundred forty".