1227418920 has 640 divisors, whose sum is σ = 5327562240. Its totient is φ = 246343680.

The previous prime is 1227418889. The next prime is 1227418937. The reversal of 1227418920 is 298147221.

1227418920 = T₃₃₉ + T₃₄₀ + ... + T₁₉₄₈.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 159 ways as a sum of consecutive naturals, for example, 6781230 + ... + 6781410.

It is an arithmetic number, because the mean of its divisors is an integer number (8324316).

Almost surely, 2^1227418920 is an apocalyptic number.

1227418920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227418920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663781120).

1227418920 is an abundant number, since it is smaller than the sum of its proper divisors (4100143320).

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

1227418920 is a wasteful number, since it uses less digits than its factorization.

1227418920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1227418920 is about 35034.5389580054. The cubic root of 1227418920 is about 1070.6912934619.

The spelling of 1227418920 in words is "one billion, two hundred twenty-seven million, four hundred eighteen thousand, nine hundred twenty".