1227920238 has 24 divisors (see below), whose sum is σ = 2665845000. Its totient is φ = 408483504.

The previous prime is 1227920237. The next prime is 1227920249. The reversal of 1227920238 is 8320297221.

It is a super-2 number, since 2×1227920238² = 3015576221779953288, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227920231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59373 + ... + 77336.

It is an arithmetic number, because the mean of its divisors is an integer number (111076875).

Almost surely, 2^1227920238 is an apocalyptic number.

1227920238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1227920238 is an abundant number, since it is smaller than the sum of its proper divisors (1437924762).

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

1227920238 is a wasteful number, since it uses less digits than its factorization.

1227920238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137216 (or 137213 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1227920238 is about 35041.6928529430. The cubic root of 1227920238 is about 1070.8370420593.

The spelling of 1227920238 in words is "one billion, two hundred twenty-seven million, nine hundred twenty thousand, two hundred thirty-eight".