1233213240 has 128 divisors (see below), whose sum is σ = 4450752000. Its totient is φ = 267038208.

The previous prime is 1233213239. The next prime is 1233213257. The reversal of 1233213240 is 423123321.

It is a super-2 number, since 2×1233213240² = 3041629790622595200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22675 + ... + 54594.

It is an arithmetic number, because the mean of its divisors is an integer number (34771500).

Almost surely, 2^1233213240 is an apocalyptic number.

1233213240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1233213240 is an abundant number, since it is smaller than the sum of its proper divisors (3217538760).

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

1233213240 is a wasteful number, since it uses less digits than its factorization.

1233213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77309 (or 77305 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1233213240 is about 35117.1359880045. The cubic root of 1233213240 is about 1072.3734659812.

Adding to 1233213240 its reverse (423123321), we get a palindrome (1656336561).

The spelling of 1233213240 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, two hundred forty".