921681348 has 48 divisors (see below), whose sum is σ = 2459304960. Its totient is φ = 263178144.

The previous prime is 921681329. The next prime is 921681349. The reversal of 921681348 is 843186129.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (921681349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257193 + ... + 260751.

It is an arithmetic number, because the mean of its divisors is an integer number (51235520).

Almost surely, 2^921681348 is an apocalyptic number.

It is an amenable number.

921681348 is an abundant number, since it is smaller than the sum of its proper divisors (1537623612).

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

921681348 is a wasteful number, since it uses less digits than its factorization.

921681348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656 (or 6654 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 921681348 is about 30359.2053255681. The cubic root of 921681348 is about 973.1809512600.

The spelling of 921681348 in words is "nine hundred twenty-one million, six hundred eighty-one thousand, three hundred forty-eight".