1216736370 has 64 divisors (see below), whose sum is σ = 3305888640. Its totient is φ = 318337344.

The previous prime is 1216736369. The next prime is 1216736399. The reversal of 1216736370 is 736376121.

1216736370 is a `hidden beast` number, since 1 + 2 + 16 + 7 + 3 + 637 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28204 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (51654510).

Almost surely, 2^1216736370 is an apocalyptic number.

1216736370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216736370 is an abundant number, since it is smaller than the sum of its proper divisors (2089152270).

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

1216736370 is a wasteful number, since it uses less digits than its factorization.

1216736370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85096 (or 85090 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 1216736370 is about 34881.7483793459. The cubic root of 1216736370 is about 1067.5760689650.

The spelling of 1216736370 in words is "one billion, two hundred sixteen million, seven hundred thirty-six thousand, three hundred seventy".