1217240190 has 32 divisors (see below), whose sum is σ = 3245974560. Its totient is φ = 324597312.

The previous prime is 1217240159. The next prime is 1217240191. The reversal of 1217240190 is 910427121.

1217240190 is a `hidden beast` number, since 1 + 2 + 172 + 401 + 90 = 666.

1217240190 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1217240190² = 2963347360302472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217240191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2253879 + ... + 2254418.

It is an arithmetic number, because the mean of its divisors is an integer number (101436705).

Almost surely, 2^1217240190 is an apocalyptic number.

1217240190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217240190 is an abundant number, since it is smaller than the sum of its proper divisors (2028734370).

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

1217240190 is a wasteful number, since it uses less digits than its factorization.

1217240190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508313 (or 4508307 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1217240190 is about 34888.9694602750. The cubic root of 1217240190 is about 1067.7234007854.

The spelling of 1217240190 in words is "one billion, two hundred seventeen million, two hundred forty thousand, one hundred ninety".