1213034240 has 144 divisors (see below), whose sum is σ = 3204877536. Its totient is φ = 436224000.

The previous prime is 1213034231. The next prime is 1213034261. The reversal of 1213034240 is 424303121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421654 + ... + 1422506.

It is an arithmetic number, because the mean of its divisors is an integer number (22256094).

Almost surely, 2^1213034240 is an apocalyptic number.

1213034240 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 1213034240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602438768).

1213034240 is an abundant number, since it is smaller than the sum of its proper divisors (1991843296).

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

1213034240 is a wasteful number, since it uses less digits than its factorization.

1213034240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1213034240 is about 34828.6410874728. The cubic root of 1213034240 is about 1066.4922075789.

Adding to 1213034240 its reverse (424303121), we get a palindrome (1637337361).

The spelling of 1213034240 in words is "one billion, two hundred thirteen million, thirty-four thousand, two hundred forty".