1230640290 has 160 divisors (see below), whose sum is σ = 3672630720. Its totient is φ = 293155200.

The previous prime is 1230640289. The next prime is 1230640357. The reversal of 1230640290 is 920460321.

1230640290 is a `hidden beast` number, since 12 + 3 + 0 + 640 + 2 + 9 + 0 = 666.

It is a super-4 number, since 4×1230640290⁴ (a number of 37 digits) contains 4444 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 524520 + ... + 526860.

It is an arithmetic number, because the mean of its divisors is an integer number (22953942).

Almost surely, 2^1230640290 is an apocalyptic number.

1230640290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230640290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836315360).

1230640290 is an abundant number, since it is smaller than the sum of its proper divisors (2441990430).

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

1230640290 is a wasteful number, since it uses less digits than its factorization.

1230640290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1230640290 is about 35080.4830354429. The cubic root of 1230640290 is about 1071.6271542773.

The spelling of 1230640290 in words is "one billion, two hundred thirty million, six hundred forty thousand, two hundred ninety".