1213632464 has 20 divisors (see below), whose sum is σ = 2565178080. Its totient is φ = 551651040.

The previous prime is 1213632457. The next prime is 1213632481. The reversal of 1213632464 is 4642363121.

It is a super-2 number, since 2×1213632464² = 2945807515349422592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213632464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3447644 + ... + 3447995.

It is an arithmetic number, because the mean of its divisors is an integer number (128258904).

Almost surely, 2^1213632464 is an apocalyptic number.

It is an amenable number.

1213632464 is an abundant number, since it is smaller than the sum of its proper divisors (1351545616).

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

1213632464 is a wasteful number, since it uses less digits than its factorization.

1213632464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895658 (or 6895652 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 1213632464 is about 34837.2281331337. The cubic root of 1213632464 is about 1066.6674970480.

Adding to 1213632464 its reverse (4642363121), we get a palindrome (5855995585).

The spelling of 1213632464 in words is "one billion, two hundred thirteen million, six hundred thirty-two thousand, four hundred sixty-four".