1390240747 has 8 divisors (see below), whose sum is σ = 1589209856. Its totient is φ = 1191362472.

The previous prime is 1390240741. The next prime is 1390240769. The reversal of 1390240747 is 7470420931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390240747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390240741) 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 7 ways as a sum of consecutive naturals, for example, 14068 + ... + 54574.

It is an arithmetic number, because the mean of its divisors is an integer number (198651232).

Almost surely, 2^1390240747 is an apocalyptic number.

1390240747 is a deficient number, since it is larger than the sum of its proper divisors (198969109).

1390240747 is an equidigital number, since it uses as much as digits as its factorization.

1390240747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45417.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1390240747 is about 37285.9322935608. The cubic root of 1390240747 is about 1116.0834574325.

The spelling of 1390240747 in words is "one billion, three hundred ninety million, two hundred forty thousand, seven hundred forty-seven".