1290379240 has 16 divisors (see below), whose sum is σ = 2903353380. Its totient is φ = 516151680.

The previous prime is 1290379229. The next prime is 1290379261. The reversal of 1290379240 is 429730921.

It can be written as a sum of positive squares in 2 ways, for example, as 1288953604 + 1425636 = 35902^2 + 1194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1290379240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16129701 + ... + 16129780.

Almost surely, 2^1290379240 is an apocalyptic number.

1290379240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290379240 is an abundant number, since it is smaller than the sum of its proper divisors (1612974140).

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

1290379240 is a wasteful number, since it uses less digits than its factorization.

1290379240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32259492 (or 32259488 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1290379240 is about 35921.8490615391. The cubic root of 1290379240 is about 1088.6938989241.

The spelling of 1290379240 in words is "one billion, two hundred ninety million, three hundred seventy-nine thousand, two hundred forty".