891398148 has 24 divisors (see below), whose sum is σ = 2189399520. Its totient is φ = 281494080.

The previous prime is 891398147. The next prime is 891398161. The reversal of 891398148 is 841893198.

It is a self number, because there is not a number n which added to its sum of digits gives 891398148.

It is not an unprimeable number, because it can be changed into a prime (891398147) 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, 1954593 + ... + 1955048.

It is an arithmetic number, because the mean of its divisors is an integer number (91224980).

Almost surely, 2^891398148 is an apocalyptic number.

It is an amenable number.

891398148 is an abundant number, since it is smaller than the sum of its proper divisors (1298001372).

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

891398148 is a wasteful number, since it uses less digits than its factorization.

891398148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909667 (or 3909665 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 891398148 is about 29856.2915982545. The cubic root of 891398148 is about 962.4036080002.

The spelling of 891398148 in words is "eight hundred ninety-one million, three hundred ninety-eight thousand, one hundred forty-eight".