1232618640 has 160 divisors (see below), whose sum is σ = 4199731200. Its totient is φ = 296578560.

The previous prime is 1232618623. The next prime is 1232618671. The reversal of 1232618640 is 468162321.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365281 + ... + 368639.

It is an arithmetic number, because the mean of its divisors is an integer number (26248320).

Almost surely, 2^1232618640 is an apocalyptic number.

1232618640 is a gapful number since it is divisible by the number (10) 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 1232618640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099865600).

1232618640 is an abundant number, since it is smaller than the sum of its proper divisors (2967112560).

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

1232618640 is a wasteful number, since it uses less digits than its factorization.

1232618640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525 (or 3519 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1232618640 is about 35108.6690149313. The cubic root of 1232618640 is about 1072.2010881774.

The spelling of 1232618640 in words is "one billion, two hundred thirty-two million, six hundred eighteen thousand, six hundred forty".