1220764734 has 36 divisors (see below), whose sum is σ = 3076827624. Its totient is φ = 348789672.

The previous prime is 1220764703. The next prime is 1220764739. The reversal of 1220764734 is 4374670221.

1220764734 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 7 + 647 + 3 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220764739) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 691162 + ... + 692925.

It is an arithmetic number, because the mean of its divisors is an integer number (85467434).

Almost surely, 2^1220764734 is an apocalyptic number.

1220764734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1220764734 is an abundant number, since it is smaller than the sum of its proper divisors (1856062890).

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

1220764734 is a wasteful number, since it uses less digits than its factorization.

1220764734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384109 (or 1384099 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 1220764734 is about 34939.4438135469. The cubic root of 1220764734 is about 1068.7529460881.

The spelling of 1220764734 in words is "one billion, two hundred twenty million, seven hundred sixty-four thousand, seven hundred thirty-four".