1440040387 has 2 divisors, whose sum is σ = 1440040388. Its totient is φ = 1440040386.

The previous prime is 1440040367. The next prime is 1440040411. The reversal of 1440040387 is 7830400441.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440040387 is a prime.

It is a super-2 number, since 2×1440040387² = 4147432632382219538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1440040307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720020193 + 720020194.

It is an arithmetic number, because the mean of its divisors is an integer number (720020194).

Almost surely, 2^1440040387 is an apocalyptic number.

1440040387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440040387 is an equidigital number, since it uses as much as digits as its factorization.

1440040387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 1440040387 is about 37947.8640637388. The cubic root of 1440040387 is about 1129.2537916758.

The spelling of 1440040387 in words is "one billion, four hundred forty million, forty thousand, three hundred eighty-seven".