1227399072 has 24 divisors (see below), whose sum is σ = 3221922816. Its totient is φ = 409132992.

The previous prime is 1227399067. The next prime is 1227399091. The reversal of 1227399072 is 2709937221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1227399072² = 3013016963892922368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6392608 + ... + 6392799.

It is an arithmetic number, because the mean of its divisors is an integer number (134246784).

Almost surely, 2^1227399072 is an apocalyptic number.

1227399072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1227399072 is an abundant number, since it is smaller than the sum of its proper divisors (1994523744).

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

1227399072 is a wasteful number, since it uses less digits than its factorization.

1227399072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12785420 (or 12785412 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 1227399072 is about 35034.2556935351. The cubic root of 1227399072 is about 1070.6855222197.

The spelling of 1227399072 in words is "one billion, two hundred twenty-seven million, three hundred ninety-nine thousand, seventy-two".