1213797340 has 24 divisors (see below), whose sum is σ = 2913113952. Its totient is φ = 416159040.

The previous prime is 1213797323. The next prime is 1213797341. The reversal of 1213797340 is 437973121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213797340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213797341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4334851 + ... + 4335130.

It is an arithmetic number, because the mean of its divisors is an integer number (121379748).

Almost surely, 2^1213797340 is an apocalyptic number.

1213797340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213797340 is an abundant number, since it is smaller than the sum of its proper divisors (1699316612).

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

1213797340 is a wasteful number, since it uses less digits than its factorization.

1213797340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669997 (or 8669995 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 1213797340 is about 34839.5944293271. The cubic root of 1213797340 is about 1066.7157983012.

The spelling of 1213797340 in words is "one billion, two hundred thirteen million, seven hundred ninety-seven thousand, three hundred forty".