897531404490 has 256 divisors, whose sum is σ = 2897560304640. Its totient is φ = 192994099200.

The previous prime is 897531404401. The next prime is 897531404527. The reversal of 897531404490 is 94404135798.

897531404490 is a `hidden beast` number, since 8 + 9 + 7 + 5 + 3 + 140 + 4 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 89991144 + ... + 90001116.

It is an arithmetic number, because the mean of its divisors is an integer number (11318594940).

Almost surely, 2^897531404490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897531404490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448780152320).

897531404490 is an abundant number, since it is smaller than the sum of its proper divisors (2000028900150).

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

897531404490 is a wasteful number, since it uses less digits than its factorization.

897531404490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12814 (or 12808 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 897531404490 in words is "eight hundred ninety-seven billion, five hundred thirty-one million, four hundred four thousand, four hundred ninety".