1216016240 has 20 divisors (see below), whose sum is σ = 2827237944. Its totient is φ = 486406464.

The previous prime is 1216016227. The next prime is 1216016251. The reversal of 1216016240 is 426106121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7600022 + ... + 7600181.

Almost surely, 2^1216016240 is an apocalyptic number.

1216016240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216016240 is an abundant number, since it is smaller than the sum of its proper divisors (1611221704).

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

1216016240 is a wasteful number, since it uses less digits than its factorization.

1216016240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15200216 (or 15200210 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1216016240 is about 34871.4244045178. The cubic root of 1216016240 is about 1067.3654110951.

The spelling of 1216016240 in words is "one billion, two hundred sixteen million, sixteen thousand, two hundred forty".