1240626240 has 448 divisors, whose sum is σ = 5088453120. Its totient is φ = 278691840.

The previous prime is 1240626229. The next prime is 1240626253. The reversal of 1240626240 is 426260421.

1240626240 is a `hidden beast` number, since 12 + 4 + 0 + 626 + 24 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4414900 + ... + 4415180.

Almost surely, 2^1240626240 is an apocalyptic number.

1240626240 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 1240626240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544226560).

1240626240 is an abundant number, since it is smaller than the sum of its proper divisors (3847826880).

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

1240626240 is a wasteful number, since it uses less digits than its factorization.

1240626240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1240626240 is about 35222.5246113904. The cubic root of 1240626240 is about 1074.5178988434.

Adding to 1240626240 its reverse (426260421), we get a palindrome (1666886661).

The spelling of 1240626240 in words is "one billion, two hundred forty million, six hundred twenty-six thousand, two hundred forty".