1240144040 has 32 divisors (see below), whose sum is σ = 2791363680. Its totient is φ = 495872832.

The previous prime is 1240143973. The next prime is 1240144109. The reversal of 1240144040 is 404410421.

It is a happy number.

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, 166067 + ... + 173373.

It is an arithmetic number, because the mean of its divisors is an integer number (87230115).

Almost surely, 2^1240144040 is an apocalyptic number.

1240144040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240144040 is an abundant number, since it is smaller than the sum of its proper divisors (1551219640).

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

1240144040 is a wasteful number, since it uses less digits than its factorization.

1240144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561 (or 11557 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1240144040 is about 35215.6788944924. The cubic root of 1240144040 is about 1074.3786681718.

Adding to 1240144040 its reverse (404410421), we get a palindrome (1644554461).

The spelling of 1240144040 in words is "one billion, two hundred forty million, one hundred forty-four thousand, forty".