1140428407 has 4 divisors (see below), whose sum is σ = 1168243776. Its totient is φ = 1112613040.

The previous prime is 1140428293. The next prime is 1140428449. The reversal of 1140428407 is 7048240411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140428407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140438407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13907623 + ... + 13907704.

It is an arithmetic number, because the mean of its divisors is an integer number (292060944).

Almost surely, 2^1140428407 is an apocalyptic number.

1140428407 is a deficient number, since it is larger than the sum of its proper divisors (27815369).

1140428407 is an equidigital number, since it uses as much as digits as its factorization.

1140428407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27815368.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 1140428407 is about 33770.2295964952. The cubic root of 1140428407 is about 1044.7747679692.

Adding to 1140428407 its reverse (7048240411), we get a palindrome (8188668818).

The spelling of 1140428407 in words is "one billion, one hundred forty million, four hundred twenty-eight thousand, four hundred seven".