1216492750 has 64 divisors (see below), whose sum is σ = 2499636672. Its totient is φ = 439632000.

The previous prime is 1216492723. The next prime is 1216492751. The reversal of 1216492750 is 572946121.

It is a super-2 number, since 2×1216492750² = 2959709221605125000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216492751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474472 + ... + 477028.

It is an arithmetic number, because the mean of its divisors is an integer number (39056823).

Almost surely, 2^1216492750 is an apocalyptic number.

1216492750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216492750 is an abundant number, since it is smaller than the sum of its proper divisors (1283143922).

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

1216492750 is a wasteful number, since it uses less digits than its factorization.

1216492750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1216492750 is about 34878.2561203968. The cubic root of 1216492750 is about 1067.5048127069.

The spelling of 1216492750 in words is "one billion, two hundred sixteen million, four hundred ninety-two thousand, seven hundred fifty".