1390203268 has 6 divisors (see below), whose sum is σ = 2432855726. Its totient is φ = 695101632.

The previous prime is 1390203263. The next prime is 1390203281. The reversal of 1390203268 is 8623020931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 869542144 + 520661124 = 29488^2 + 22818^2 .

It is not an unprimeable number, because it can be changed into a prime (1390203263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173775405 + ... + 173775412.

Almost surely, 2^1390203268 is an apocalyptic number.

It is an amenable number.

1390203268 is a deficient number, since it is larger than the sum of its proper divisors (1042652458).

1390203268 is a wasteful number, since it uses less digits than its factorization.

1390203268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347550821 (or 347550819 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1390203268 is about 37285.4297011581. The cubic root of 1390203268 is about 1116.0734279783.

The spelling of 1390203268 in words is "one billion, three hundred ninety million, two hundred three thousand, two hundred sixty-eight".