897987426 has 48 divisors (see below), whose sum is σ = 2093724000. Its totient is φ = 256011840.

The previous prime is 897987421. The next prime is 897987451. The reversal of 897987426 is 624789798.

It is a self number, because there is not a number n which added to its sum of digits gives 897987426.

It is not an unprimeable number, because it can be changed into a prime (897987421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143646 + ... + 149766.

It is an arithmetic number, because the mean of its divisors is an integer number (43619250).

Almost surely, 2^897987426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897987426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046862000).

897987426 is an abundant number, since it is smaller than the sum of its proper divisors (1195736574).

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

897987426 is a wasteful number, since it uses less digits than its factorization.

897987426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639 (or 6632 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The square root of 897987426 is about 29966.4383269016. The cubic root of 897987426 is about 964.7691738533.

The spelling of 897987426 in words is "eight hundred ninety-seven million, nine hundred eighty-seven thousand, four hundred twenty-six".