1318245390 has 144 divisors (see below), whose sum is σ = 4305790944. Its totient is φ = 273905280.

The previous prime is 1318245359. The next prime is 1318245421. The reversal of 1318245390 is 935428131.

1318245390 is a `hidden beast` number, since 13 + 18 + 245 + 390 = 666.

It is an interprime number because it is at equal distance from previous prime (1318245359) and next prime (1318245421).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 67584 + ... + 84876.

It is an arithmetic number, because the mean of its divisors is an integer number (29901326).

Almost surely, 2^1318245390 is an apocalyptic number.

1318245390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318245390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152895472).

1318245390 is an abundant number, since it is smaller than the sum of its proper divisors (2987545554).

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

1318245390 is a wasteful number, since it uses less digits than its factorization.

1318245390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17335 (or 17321 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1318245390 is about 36307.6491940748. The cubic root of 1318245390 is about 1096.4750496948.

The spelling of 1318245390 in words is "one billion, three hundred eighteen million, two hundred forty-five thousand, three hundred ninety".