1216293790 has 8 divisors (see below), whose sum is σ = 2189328840. Its totient is φ = 486517512.

The previous prime is 1216293787. The next prime is 1216293803. The reversal of 1216293790 is 973926121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 60814680 + ... + 60814699.

It is an arithmetic number, because the mean of its divisors is an integer number (273666105).

Almost surely, 2^1216293790 is an apocalyptic number.

1216293790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216293790 is a deficient number, since it is larger than the sum of its proper divisors (973035050).

1216293790 is a wasteful number, since it uses less digits than its factorization.

1216293790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121629386.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1216293790 is about 34875.4037969455. The cubic root of 1216293790 is about 1067.4466119662.

The spelling of 1216293790 in words is "one billion, two hundred sixteen million, two hundred ninety-three thousand, seven hundred ninety".