1235242440 has 256 divisors, whose sum is σ = 4590432000. Its totient is φ = 293621760.

The previous prime is 1235242429. The next prime is 1235242453. The reversal of 1235242440 is 442425321.

1235242440 is a `hidden beast` number, since 1 + 235 + 2 + 424 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 347070 + ... + 350610.

It is an arithmetic number, because the mean of its divisors is an integer number (17931375).

Almost surely, 2^1235242440 is an apocalyptic number.

1235242440 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 1235242440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2295216000).

1235242440 is an abundant number, since it is smaller than the sum of its proper divisors (3355189560).

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

1235242440 is a wasteful number, since it uses less digits than its factorization.

1235242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597 (or 3587 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1235242440 is about 35146.0159904362. The cubic root of 1235242440 is about 1072.9613253279.

Adding to 1235242440 its reverse (442425321), we get a palindrome (1677667761).

The spelling of 1235242440 in words is "one billion, two hundred thirty-five million, two hundred forty-two thousand, four hundred forty".