1213487958 has 16 divisors (see below), whose sum is σ = 2532496896. Its totient is φ = 386909160.

The previous prime is 1213487923. The next prime is 1213487969. The reversal of 1213487958 is 8597843121.

It is a super-2 number, since 2×1213487958² = 2945106048422019528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4396558 + ... + 4396833.

It is an arithmetic number, because the mean of its divisors is an integer number (158281056).

Almost surely, 2^1213487958 is an apocalyptic number.

1213487958 is an abundant number, since it is smaller than the sum of its proper divisors (1319008938).

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

1213487958 is a wasteful number, since it uses less digits than its factorization.

1213487958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8793419.

The product of its digits is 483840, while the sum is 48.

The square root of 1213487958 is about 34835.1540544893. The cubic root of 1213487958 is about 1066.6251596913.

The spelling of 1213487958 in words is "one billion, two hundred thirteen million, four hundred eighty-seven thousand, nine hundred fifty-eight".