1321777936 has 40 divisors (see below), whose sum is σ = 2635138880. Its totient is φ = 641810304.

The previous prime is 1321777861. The next prime is 1321777937. The reversal of 1321777936 is 6397771231.

It is not an unprimeable number, because it can be changed into a prime (1321777937) 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, 364645 + ... + 368251.

It is an arithmetic number, because the mean of its divisors is an integer number (65878472).

Almost surely, 2^1321777936 is an apocalyptic number.

1321777936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1321777936 is a deficient number, since it is larger than the sum of its proper divisors (1313360944).

1321777936 is a wasteful number, since it uses less digits than its factorization.

1321777936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271 (or 4265 counting only the distinct ones).

The product of its digits is 333396, while the sum is 46.

The square root of 1321777936 is about 36356.2640544927. The cubic root of 1321777936 is about 1097.4535963485.

The spelling of 1321777936 in words is "one billion, three hundred twenty-one million, seven hundred seventy-seven thousand, nine hundred thirty-six".