1213294632 has 128 divisors (see below), whose sum is σ = 3412886400. Its totient is φ = 356249600.

The previous prime is 1213294631. The next prime is 1213294651. The reversal of 1213294632 is 2364923121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1213294593 and 1213294602.

It is not an unprimeable number, because it can be changed into a prime (1213294631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2132044 + ... + 2132612.

It is an arithmetic number, because the mean of its divisors is an integer number (26663175).

Almost surely, 2^1213294632 is an apocalyptic number.

1213294632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213294632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706443200).

1213294632 is an abundant number, since it is smaller than the sum of its proper divisors (2199591768).

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

1213294632 is a wasteful number, since it uses less digits than its factorization.

1213294632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 823 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 1213294632 is about 34832.3790746483. The cubic root of 1213294632 is about 1066.5685137983.

The spelling of 1213294632 in words is "one billion, two hundred thirteen million, two hundred ninety-four thousand, six hundred thirty-two".