1247830190 has 16 divisors (see below), whose sum is σ = 2250974880. Its totient is φ = 498047520.

The previous prime is 1247830139. The next prime is 1247830193. The reversal of 1247830190 is 910387421.

It is a super-2 number, since 2×1247830190² = 3114160366150872200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1247830190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247830193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130730 + ... + 139949.

It is an arithmetic number, because the mean of its divisors is an integer number (140685930).

Almost surely, 2^1247830190 is an apocalyptic number.

1247830190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247830190 is a deficient number, since it is larger than the sum of its proper divisors (1003144690).

1247830190 is a wasteful number, since it uses less digits than its factorization.

1247830190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271147.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1247830190 is about 35324.6399840112. The cubic root of 1247830190 is about 1076.5936888279.

The spelling of 1247830190 in words is "one billion, two hundred forty-seven million, eight hundred thirty thousand, one hundred ninety".