1243024040 has 32 divisors (see below), whose sum is σ = 2856314880. Its totient is φ = 486629952.

The previous prime is 1243024039. The next prime is 1243024063. The reversal of 1243024040 is 404203421.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 328712 + ... + 332471.

It is an arithmetic number, because the mean of its divisors is an integer number (89259840).

Almost surely, 2^1243024040 is an apocalyptic number.

1243024040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243024040 is an abundant number, since it is smaller than the sum of its proper divisors (1613290840).

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

1243024040 is a wasteful number, since it uses less digits than its factorization.

1243024040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661241 (or 661237 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1243024040 is about 35256.5460588527. The cubic root of 1243024040 is about 1075.2097056187.

Adding to 1243024040 its reverse (404203421), we get a palindrome (1647227461).

The spelling of 1243024040 in words is "one billion, two hundred forty-three million, twenty-four thousand, forty".