1213072620 has 48 divisors (see below), whose sum is σ = 3430250208. Its totient is φ = 320281600.

The previous prime is 1213072607. The next prime is 1213072643. The reversal of 1213072620 is 262703121.

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, 94029 + ... + 106148.

It is an arithmetic number, because the mean of its divisors is an integer number (71463546).

Almost surely, 2^1213072620 is an apocalyptic number.

1213072620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213072620 is an abundant number, since it is smaller than the sum of its proper divisors (2217177588).

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

1213072620 is a wasteful number, since it uses less digits than its factorization.

1213072620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200290 (or 200288 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1213072620 is about 34829.1920664261. The cubic root of 1213072620 is about 1066.5034552799.

Adding to 1213072620 its reverse (262703121), we get a palindrome (1475775741).

The spelling of 1213072620 in words is "one billion, two hundred thirteen million, seventy-two thousand, six hundred twenty".