1290788946 has 40 divisors (see below), whose sum is σ = 2933086464. Its totient is φ = 424199160.

The previous prime is 1290788923. The next prime is 1290788951. The reversal of 1290788946 is 6498870921.

It is a super-2 number, since 2×1290788946² = 3332272206231581832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1290788892 and 1290788901.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44610 + ... + 67613.

Almost surely, 2^1290788946 is an apocalyptic number.

1290788946 is an abundant number, since it is smaller than the sum of its proper divisors (1642297518).

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

1290788946 is a wasteful number, since it uses less digits than its factorization.

1290788946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112308 (or 112299 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1290788946 is about 35927.5513499042. The cubic root of 1290788946 is about 1088.8091098144.

The spelling of 1290788946 in words is "one billion, two hundred ninety million, seven hundred eighty-eight thousand, nine hundred forty-six".