1204512990 has 64 divisors (see below), whose sum is σ = 3086747136. Its totient is φ = 300085632.

The previous prime is 1204512989. The next prime is 1204513027. The reversal of 1204512990 is 992154021.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9372 + ... + 49968.

It is an arithmetic number, because the mean of its divisors is an integer number (48230424).

Almost surely, 2^1204512990 is an apocalyptic number.

1204512990 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 1204512990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543373568).

1204512990 is an abundant number, since it is smaller than the sum of its proper divisors (1882234146).

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

1204512990 is a wasteful number, since it uses less digits than its factorization.

1204512990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40673.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1204512990 is about 34706.0944215854. The cubic root of 1204512990 is about 1063.9890602970.

The spelling of 1204512990 in words is "one billion, two hundred four million, five hundred twelve thousand, nine hundred ninety".