1229532864 has 224 divisors, whose sum is σ = 3964838400. Its totient is φ = 328458240.

The previous prime is 1229532833. The next prime is 1229532877. The reversal of 1229532864 is 4682359221.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 2272434 + ... + 2272974.

Almost surely, 2^1229532864 is an apocalyptic number.

1229532864 is a gapful number since it is divisible by the number (14) 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 1229532864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982419200).

1229532864 is an abundant number, since it is smaller than the sum of its proper divisors (2735305536).

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

1229532864 is a wasteful number, since it uses less digits than its factorization.

1229532864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 661 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 1229532864 is about 35064.6954072041. The cubic root of 1229532864 is about 1071.3056132777.

The spelling of 1229532864 in words is "one billion, two hundred twenty-nine million, five hundred thirty-two thousand, eight hundred sixty-four".