891377746 has 16 divisors (see below), whose sum is σ = 1534475520. Its totient is φ = 380419200.

The previous prime is 891377741. The next prime is 891377791. The reversal of 891377746 is 647773198.

It is a junction number, because it is equal to n+sod(n) for n = 891377693 and 891377702.

It is not an unprimeable number, because it can be changed into a prime (891377741) 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, 129855 + ... + 136546.

It is an arithmetic number, because the mean of its divisors is an integer number (95904720).

Almost surely, 2^891377746 is an apocalyptic number.

891377746 is a deficient number, since it is larger than the sum of its proper divisors (643097774).

891377746 is a wasteful number, since it uses less digits than its factorization.

891377746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266649.

The product of its digits is 1778112, while the sum is 52.

The square root of 891377746 is about 29855.9499262710. The cubic root of 891377746 is about 962.3962655618.

The spelling of 891377746 in words is "eight hundred ninety-one million, three hundred seventy-seven thousand, seven hundred forty-six".